23 October 2017

                                     Doriemus Plc                                  

                             ("Doriemus" or the "Company")                         

                 UK Government Oil and Gas Authority Approval Granted              

                          Brockham Oil Field, Weald Basin, UK                      

    Doriemus plc (Listed in Australia ASX:DOR and listed in London NEX:DOR) ("
    Doriemus" or the "Company"), is pleased to announce that it has been informed
    by the operators of the Brockham Oil Field, Angus Energy Plc (the "operator"),
    that it has received final approval from the UK Government's Oil and Gas
    Authority ("OGA") for its Field Development Plan Addendum at the Brockham Oil
    Field (Production License PL235).

    David Lenigas, Doriemus's Executive Chairman, commented; "This is excellent
    news for the Brockham Oil Field. We at Doriemus now have a great deal of
    activity happening at both our Brockham and Lidsey Oil Fields and will soon be
    conducting the extended well testing programme at the Horse Hill -1 "Gatwick
    Gusher" well as announced last week.  

    The Brockham Oil Field is a fully permitted production licence and sits
    immediately north-west of the Horse Hill licences, in which Doreimus holds an
    interest.

    This OGA approval is the final regulatory consent needed to begin production
    from the Kimmeridge layers in well BR-X4Z ("X4Z").

    The X4Z Well will inititially produce from a 200 meter ("m") naturally
    fractured section of a 385m thick Kimmeridge interbedded shale and limestone
    layer. Further technical quidance can be found in the Company's news release of
    3 March 2017. In Summary from the 3 March news release stated:

    "The Brockham X4Z well, drilled to a total depth of 1,391m, was planned to
    evaluate the Portland, Corallian and Kimmeridge formations at Brockham
    including an evaluation of the Kimmeridge reservoir that had been demonstrated
    by the Horse Hill discovery 8 km to the South. The operator of the  well at
    Horse Hill has announced cumulative production rates of over 1,500 barrels per
    day in short term testing. The Brockham X4Z well was intended to establish
    whether the evidence of a potential reservoir  reported at Horse Hill extended
    further North into the Brockham Licence.

    The operator announced that the preliminary results from Brockham X4Z confirm
    very similar thickness of reservoir and properties to those reported at Horse
    Hill. The gross thickness of Kimmeridge in  Brockham X4Z is some 385m thick.
    The two limestone intervals (each around 30m) tested in Horse Hill are also
    seen in the Brockham well. The reservoir properties appear to be very similar
    to Horse Hill, based on electrical logging evidence."

    Prior to initiating production, the operator will first install a connection to
    the UK's National Grid for the  distribution of excess power generated on-site.
    This power generation will have the added benefit of allowing the Company to
    supply surplus power to the National Grid.

    Upon completion of this installation, production from X4Z will commence.
    Doriemus will update the market in due course.

    The Company reiterates there will be no hydraulic fracturing or "fracking" at
    the Brockham Oil Field.

    Interest in Brockham Oil Field (PL 235):

    Doriemus owns a 10% direct interest in the Brockham Oil Field which is held
    under UK Production Licence PL 235.

    The directors of the Company accept responsibility for the contents of this
    announcement.

    CONTACTS:

    For further information on this update or the Company generally, please visit
    our website at

    www.doriemus.co.uk or contact:

    Doriemus Plc

    UK Contacts:

    David Lenigas (Executive Chairman)        
                                                                    +44 (0) 20 7440
    0640

    Greg Lee (Technical Director)
                                                                                 
          

    Australia Contacts:

    Julia Beckett (Joint Company Secretary)
                                                               +61 (08) 6141 3500

    Email: julia.beckett@wolfstargroup.com.au

    UK Advisors:

    Peterhouse Corporate Finance Limited                                       
                             +44 (0) 20 7469 0930

    Guy Miller

    Fungai Ndoro

    FORWARD LOOKING STATEMENTS AND IMPORTANT NOTICE:

    This document may contain forward looking statements that are subject to risk
    factors associated with the oil and gas industry. It is believed that the
    expectations reflected in these statements are reasonable, but they may be
    affected by many variables which could cause actual results or trends to differ
    materially.

    Investors should make and rely upon their own enquiries before deciding to
    acquire or deal in the Company's securities.

    This report contains forecasts, projections and forward looking information. 
    Although the Company believes that its expectations, estimates and forecast
    outcomes are based on reasonable assumptions it can give no assurance that
    these will be achieved.  Expectations, estimates and projections and
    information provided by the Company are not a guarantee of future performance
    and involve unknown risks and uncertainties, many of which are out of the
    Company's control.  Actual results and developments will almost certainly
    differ materially from those expressed or implied. The Company has not audited
    or investigated the accuracy or completeness of the information, statements and
    opinions contained in this report.  To the maximum extent permitted by
    applicable laws, the Company makes no representation and can give no assurance,
    guarantee or warranty, express or implied, as to, and takes no responsibility
    and assumes no liability for (1) the authenticity, validity, accuracy,
    suitability or completeness of, or any errors in or omission from, any
    information, statement or opinion contained in this report and (2) without
    prejudice to the generality of the foregoing, the achievement or accuracy of
    any forecasts, projections or other forward looking information contained or
    referred to in this report.