18 March 2015

                                 Doriemus plc

                        ("Doriemus" or "the Company")

                Update on Horse Hill discovery, UK Weald Basin

          Update on Nutech well analysis - Further potential oil pay
                                  identified

Doriemus plc (AIM: DOR) is pleased to announce that UK Oil and Gas
Investments Plc ("UKOG"), has made the following positive news release with
respect to the Horse Hill -1 well in the UK's Weald Basin.

Doriemus interest in Horse Hill:

The Horse Hill-1 well is located within onshore exploration license
PEDL 137, on the northern side of the Weald Basin near Gatwick Airport.
Doriemus owns a 10% direct interest in Horse Hill Developments Ltd ("HHDL").
HHDL is a special purpose company that owns a 65% participating interest and
operatorship of licence PEDL 137 and the adjacent licence PEDL 246 in the UK
Weald Basin. The participants in the Horse Hill-1 well are HHDL with a 65%
working interest and Magellan Petroleum Corporation with a 35% interest.

Enquiries:

Doriemus plc
Donald Strang/Hamish Harris      +44 (0) 20 7440 0640

Cairn Financial Advisers LLP:
James Caithie / Carolyn Sansom   +44 (0) 20 7148 7900

Public Relations:                +44 (0) 20 7929 5599
Square 1 Consulting Ltd
David Bick/Mark Longson

UKOG news Release of 18 March 2015 in full is as follows:

London listed UK Oil & Gas Investments PLC (LSE AIM: UKOG) is pleased to
announce that ongoing well analysis of the Horse Hill-1 well ("HH-1") in the
UK's Weald Basin with alliance partner NUTECH Ltd ("NUTECH") has identified
that, in addition to the previously reported 102 feet of Portland sandstone
gross oil pay, a further 407 net feet of potential oil pay calculated from
electric logs exists within limestones and claystones of the Kimmeridge Clay
("Kimmeridge"), Oxford Clay ("Oxford") and Middle Lias ("Lias") Formations.

Stephen Sanderson, UKOG's CEO, commented:

"The additional 250 geochemical analyses confirm that the HH-1 well penetrated
a very thick section of world class, thermally mature, oil saturated source
rocks in the Kimmeridge section encasing the Kimmeridge limestones and we look
forward to receiving NUTECH's further rock sample analyses and the resultant
final log interpretation in the coming few weeks."

"Of greatest note is that NUTECH's initial log analyses, utilising all the
geochemical calibration points, strongly indicates that the Kimmeridge
contains a potential oil pay section calculated from electric logs of over 300
feet with a further 73 feet of potential oil pay in the Oxford and Lias. The
fact that the Kimmeridge potential pay section displays elevated electric log
resistivity measurements within a sampled zone exceeding 2% TOC adds strength
to NUTECH's interpretation."

"NUTECH's further lab analyses, specifically focussed to help calibrate
electric log measurements of total porosity, are thus absolutely fundamental
to provide the company with confirmation of the potentially significant
oil-in-place contained in the well. The data and analyses to date give strong
encouragement that the company has encountered something new and substantive
in the Kimmeridge section of PEDL137 and PEDL246 to add to the HH-1 Portland
sandstone oil discovery."

Update on HH-1:

Further to the announcement of 17 December 2014, UKOG has now received and
completed the analysis on all the outstanding 277 geochemical samples covering
the main areas of interest in the HH-1 well within the PEDL137 and PEDL246
licences, as announced on 17 December 2014. Detailed geochemical analysis,
comprising a total of 270 Total Organic Carbon ("TOC") and 28 RockEval
pyrolysis analyses, was undertaken on drill samples, predominantly at 10 foot
depth intervals, from 2510 to 5530 feet measured depth ("ftmd") and 6680-8620
ftmd covering the main formations of interest in the prospective Jurassic
Portland, Kimmeridge, Oxford and Lias sections of the well. Furthermore, these
geochemical analyses have been incorporated by NUTECH, one of the world's
leading companies in petrophysical analysis and reservoir intelligence, into a
preliminary electric log interpretation of the HH-1 well which demonstrates
that, in addition to the previously reported 102 feet of Portland sandstone
gross oil pay, a further 407 feet of potential oil pay exists in the well
within the limestone and claystone sections of the Kimmeridge, Oxford and Lias
Formations.

Geochemical results:

The results of the HH-1 detailed geochemical analysis confirm and conclude
that the 1496 ft vertical thickness of Kimmeridge section in HH-1 contains
three discrete thermally mature, highly organic rich, world class, claystone
source rock units lying directly above, below and between the Upper and Lower
Kimmeridge micritic limestone bands (see UKOG RNS Dec 17 2014). The Upper,
Middle and Lower Kimmeridge source rock units contain in excess of 780 feet of
drilled section exceeding 2% TOC by weight, with an average of 4.1% TOC. The
richest section, and possible sweet spot, lies between the base of the Upper
Limestone and Top Lower Limestone at 2931-3084 ftmd with an average of 5% TOC
and a high of 9.4% TOC. Additional pyrolysis results confirm that the source
richness of the three Kimmeridge source units is very high with measured
Generative Potentials ("S2") ranging from an average of 35 kg/tonne to a high
of 103 kg/tonne and with Hydrogen Indices ("HI") averaging 754 with a high
exceeding 1000.

The new geochemical analyses demonstrate that an additional 140 feet thick,
thermally mature, claystone source rock unit, exceeding 1% TOC, exists at the
base of the Middle Jurassic Oxfordian to Cornbrash section from 5400-5540
ftmd. A distinct 50 foot section from 5450-5500 ftmd shows average metrics of
2.6% TOC, S2 of 16 Kg/tonne and an HI of 617. Furthermore a 60 foot thick
section of the Lias from 7400-7460 ftmd exceeds 1% TOC, with average metrics
of 1.5% TOC, S2 of 5 kg/tonne and HI of 443. More samples from this 60 foot
Lias zone will be sent for additional RockEval pyrolysis.

Further geochemical analysis is planned in the well to understand the
percentage of organic matter converted to hydrocarbons within all identified
source units in the well together with values of initial TOC, S2 and HI prior
to entering the hydrocarbon generative window

Thermal maturity:

As detailed in UKOG's 17 December 2014 RNS the Kimmeridge, Oxfordian and Lias
sections in the well are interpreted to be thermally mature for hydrocarbon
generation, with measured Vitrinite Reflectance ("Ro") exceeding 0.61% at 2720
ftmd/2450 feet true vertical depth ("tvdss"). The basal unit of the Kimmeridge
section falls within the peak oil generation window with a measured Ro of
0.81% at 4180 ftmd/3530 ft tvdss.

NUTECH Initial Log Analyses:

Since the 29 January 2015 UKOG and Solo Oil Plc alliance with NUTECH, UKOG has
been working closely with NUTECH's Houston based team to derive an initial
view of electric log derived reservoir parameters, including oil in place
volumes and rock mechanical properties, encountered in the HH-1 discovery.

NUTECH's initial electric log analysis, utilising the 298 geochemical samples
for calibration, indicates that in addition to the Portland sandstone pay
previously reported, the HH-1 well contains 407 net feet of net oil saturated
potential pay within the limestones and claystones of Kimmeridge, Oxford and
Lias sections of the well.

The three Kimmeridge source units with TOCs above 2%, are interpreted by
NUTECH to contain a total of 334 feet of net oil saturated potential pay. This
interpreted Kimmeridge pay section demonstrates an elevated resistivity
response compared to background non-source units of similar lithology.

An additional 43 feet of potential oil pay within a gross 90 foot interval is
interpreted to exist within the claystones of the Middle Jurassic Oxford and
Cornbrash section. A 30 foot potential pay zone in claystones is also
calculated in the Lias, however, this interval has only two samples both
demonstrating less than 2% TOC.

The geochemical and NUTECH initial log interpretation results are summarised
in Table 1 below:

Table 1: Geochemical and NUTECH initial log analysis run

                Gross    NUTECH      Source Unit         Generative     Hydrogen Index
                                       Measured        Potential, S2
  Formation   Thickness  Net Oil                                          Kg H/tonne
  Interval                zone       TOC Weight %         kg/tonne
               >2% TOC
                Feet      Feet     Average    Max      Average   Max     Average  Max
Kimmeridge       780       334       4.1      9.4       35       103      754    1000+
Oxfordian        90        43        2.6      2.8       16        19      617     671
Lias              -       30 *       1.5      1.6        5       6.5      443     445
Table 1: Geochemical and NUTECH initial log analysis run, source UKOG and
NUTECH, *Calculated in a zone with 2 rock samples showing <2% TOC .

UKOG has a net attributable interest of 20.82% in the discovery

NUTECH Further Analysis:

NUTECH are currently running a further suite of 116 samples from 58
depth-points from the HH-1 for XRD (X-Ray Diffraction) and MICP (Mercury
Injection Capillary Pressure) analysis in the US to provide more detailed
calibration of the electric log response. These results are expected within
the next few weeks. The final NUTECH evaluation of HH-1, with oil in place
volumes per US sector (640 acres or square mile) is expected to be available
shortly thereafter.

In addition, UKOG is working with NUTECH on their analyses of key wells
surrounding the 140 km2 (34,600 acres) PEDL137 and PEDL246 licences to further
define the likely semi-regional extent and size of the Kimmeridge, Oxford and
Liassic oil bearing formations encountered in the HH-1 well. NUTECH will also
research their extensive database of global producing oil wells to furnish
UKOG with source and reservoir metrics from potentially analogous rock
formations to the Kimmeridge.

UKOG's interest in Horse Hill:

The Horse Hill-1 well is located within onshore exploration License PEDL 137,
on the northern side of the Weald Basin near Gatwick Airport. UKOG now owns a
30% direct interest in Horse Hill Developments Ltd ("HHDL") and a 1.32%
interest in HHDL via its 6% interest in Angus Energy Limited. HHDL is a
special purpose company that owns a 65% participating interest and
operatorship of Licence PEDL 137 and the adjacent Licence PEDL 246 in the UK
Weald Basin. The participants in the Horse Hill-1 well are HHDL with a 65%
working interest and Magellan Petroleum Corporation with a 35% interest.

Qualified Person's Statement:

Stephen Sanderson, UKOG's CEO, who has over 30 years of relevant experience in
the oil industry, has approved the information contained in this announcement.
Mr Sanderson is a Fellow of the Geological Society of London and is an active
member of the American Association of Petroleum Geologists.

For further information please contact:

UK Oil & Gas Investments PLC
David Lenigas / Donald Strang Tel: 020 7440 0640

WH Ireland (Nominated Adviser and Broker)
James Joyce / Mark Leonard Tel: 020 7220 1666

Square 1 Consulting (Public Relations)
David Bick / Mark Longson Tel: 020 7929 5599

Glossary: discovery  a discovery is a petroleum accumulation for which one or
                     several exploratory wells have established through
                     testing, sampling and/or logging the existence of a
                     significant quantity of potentially moveable hydrocarbons
electric logs        tools used within the wellbore to measure the rock and
                     fluid properties of surrounding rock formations

gamma-ray log        an electric log which measures natural background
                     radioactivity emitted mainly by potassium, uranium and
                     thorium isotopes used as a sedimentary lithology
                     discriminator

generative potential the amount of hydrocarbons that can be generated from a
(S2)                 unit volume of source rock established via the S2 peak
                     from rock-evaluation pyrolysis, normally expressed in
                     milligrammes of hydrocarbon per gramme of rock (or
                     kilogramme per tonne). The S2 figure is achieved when
                     100% of the organic matter is transformed into
                     hydrocarbons.

hot shale            a shale rock displaying average initial TOCs normally
                     exceeding 2% and represented by a high gamma ray electric
                     log reading

hydrogen index (HI)  the amount of hydrogen relative to the amount of organic
                     carbon in a sample, normally expressed in milligrammes of
                     hydrogen per gramme of TOC. The higher the amount of
                     hydrogen the more oil prone the source rock when
                     subjected to time temperature and pressure; an initial HI
                     over 450 normally indicates an oil prone source rock

measured depth       The length of the wellbore, as if determined by a
                     measuring stick. This measurement differs from the true
                     vertical depth of the well in all but vertical wells.
                     Since the wellbore cannot be physically measured from end
                     to end, the lengths of individual joints of drill pipe,
                     drill collars and other drill string elements are
                     measured with a steel tape measure and added together. In
                     virtually all cases, the actual wellbore is slightly
                     deeper than the reported depth due to the expansion of
                     the steel drill pipe under its own weight.

MICP                 mercury injection capillary pressure. A technique to
                     provide data for the calibration of porosity logs using
                     fresh or archived cuttings samples as well as core. MICP
                     analysis is performed by placing a tarred sample in the
                     instrument chamber which is then evacuated and flooded
                     with mercury. Pressure on the mercury is incrementally
                     increased forcing mercury through progressively smaller
                     pore throats. The volume of mercury forced into the
                     sample is equivalent to the volume of porosity accessed.
micrite              a sedimentary rock formed of very fine grained calcareous
                     particles ranging in diameter from 0.06 to 2 mm, often
                     referred to as lime mudstone

pay                  A reservoir or portion of a reservoir that contains
                     economically producible hydrocarbons. The term derives
                     from the fact that it is capable of "paying" an income.
                     The overall interval in which pay sections occur is the
                     gross pay; the smaller portions of the gross pay that
                     meet local criteria for pay (such as minimum porosity,
                     permeability and hydrocarbon saturation) are net pay.
oil initially in     the quantity of oil or petroleum that is estimated to
place                exist originally in naturally occurring accumulations
                     before any extraction or production

oil saturation       the amount of the pore space within a reservoir
                     containing oil
play                 a set of known or postulated oil and or gas accumulations
                     sharing similar geologic, geographic, and temporal
                     properties, such as source rock, migration pathways,
                     timing, trapping mechanism, and hydrocarbon type

porosity             the percentage of void space in a rock formation, where
                     the void may contain, for example, water or petroleum

pyrolysis            pyrolysis is the decomposition of organic matter by
                     heating in the absence of oxygen. Organic geochemists use
                     pyrolysis to measure TOC, generative potential (S2),
                     richness (HI) and maturity of potential source rocks. In
                     a pyrolysis analysis, the organic content is pyrolyzed in
                     the absence of oxygen, then combusted. The amount of
                     hydrocarbons and carbon dioxide released is measured.

reservoir            a subsurface rock formation containing an individual
                     natural accumulation of moveable petroleum that is
                     confined by impermeable rock/formations
RockEval             the most widely used pyrolysis technique.
source rock          a rock rich in organic matter which, if subjected to
                     sufficient heat and pressure over geological time, will
                     generate oil or gas. Typical source rocks, usually shale
                     or limestone, contain above an initial 1% organic matter
                     by weight

sweet spot           the area within a shale source rock unit showing highest
                     TOC and generative potential normally associated with
                     basin centred deposition

thermally mature     a term applied to source rocks which have received
                     sufficient temperature and pressure over geological time
                     to generate hydrocarbons
TOC                  total organic carbon - the weight percent amount of
                     organic carbon within the rock which is a commonly used
                     measure of hydrocarbon source rock richness
tvdss                true vertical depth below a subsea datum

vitrinite            a measure of the percentage of incident light reflected
reflectance (Ro)     from the surface of vitrinite particles in a sedimentary
                     rock. It is referred to as % Ro and is a measure of the
                     thermal maturity of a rock. Top of the oil window is
                     dependent on source rock type, but is widely recognized
                     to be at an Ro equivalent of between 0.5-0.6%

XRD                  X-ray diffraction. A technique used to determine the
                     precise mineralogical content of a rock sample