Update on UK onshore oil investments

16 May 2014 Doriemus Plc ("Doriemus" or the "Company") Update on UK onshore oil investments Doriemus (AIM: DOR) today announces that Angus Energy Limited ("Angus Energy")as operator of the Horse Hill Prospect in the Weald Basin near Gatwick Airportis on schedule for a potential spud date in July 2014. In addition, AngusEnergy, as major shareholder and operator, has provided the following update onits onshore producing Brockham and Lidsey Oil Fields in the Weald Basin southof London. Donald Strang, the Company's Chairman, commented: "There have been some unscheduled delays with stage 2 improvement programmes atthe two producing fields, but we are optimistic that the next few months shouldbe very active on the ground. The news that Horse Hill is planned to spud in July is exciting for theCompany, as this well will be testing known oil targets and exploring theconcept of a gas in the deeper Triassic." Horse Hill Prospect: (10% 0wned by DOR and operated by Angus Energy) Angus Energy, the major shareholder of Horse Hill Development Ltd ("HHDL") andthe operator of the Horse Hill Petroleum Exploration and Development LicenceNo. 137 (PEDL 137) located in Surrey, United Kingdom' has provided the Companywith the following update on the proposed Horse Hill-1 well planned forcompletion by the end of August 2014. * All tenders are now out for the site construction and long lead items for the well. * The contracts for the drill rig and key service providers are in the final stages of negotiation. * Permitting is currently on track for a spud date in July 2014. * The depth of Horse Hill-1 well has been set to 8,512 feet to test conventional stacked oil and gas targets. DOR has a direct 10.0% interest in Horse Hill Development Ltd ("HHDL"), aspecial purpose company that owns a 65% participating interest and operatorshipof the Horse Hill licence PEDL 137. As previously announced on 13 January 2014, the Horse Hill-1 well is designedto test a number of conventional stacked oil and gas targets which the boardbelieves could contain up to an estimated 671 million stock barrels ("MMSTB")oil in place with an estimated total mean recoverable prospective resources of87 MMSTB and additional prospectivity of 456 Bcf gas in place (Mean 164+ Bcfrecoverable prospective resource) in the proposed Triassic gas play. Brockham Oil Field (10% owned by DOR and operated by Angus Energy): The Brockham Oil Field ("Brockham"), in the Weald Basin, is held under UnitedKingdom Production Licence PL 235. Oil production was recently increased from42 bopd to 84 bopd after a successful work-over programme in January 2014 andproduction has only slightly tapered off to its current levels of about 66bopd. Brockham's 28 API oil is regularly trucked and sold to the PerencoRefinery. The planned 450 metre side-track well at Brockham, designed to increase overallproduction from the Field, as previously announced on 25 April 2014, has beentemporarily delayed by up to 13 weeks due to the UK Environmental Agency havingrecently requested that the operator Angus Energy must apply for a new miningwaste permit. The Operator is currently attending to obtaining this additionalpermit. An appropriate drill rig is on standby to undertake this side-track well, andit is planned to mobilise the rig to site once the new mining waste permit hasbeen issued. In preparation for the expected increase in oil production, post theside-track, Angus Energy has now completed the refurbishment of the1,200-barrel storage tank facilities. In March 2014, the Company announced that RPS Energy Consultants Limited("RPS") had independently assessed that, as at 31 December 2013, the BrockhamField contains 3.62 million barrels (gross) Oil in-place (P50 best case). Lidsey Oil Field (20% owned by DOR and operated by Angus Energy): The Lidsey Oil Field ("Lidsey"), in the Weald Basin, is held under UnitedKingdom Production Licence PL 241. Oil production was 25 bopd, prior to are-completion programme completed in November and December 2013, which resultedin a temporary boost in oil production. Production has steadily declined to 36bopd and Angus Energy has now formally advised the partners in Lidsey that anew re-completion is being planned in order to again increase production.Applications are now being prepared for the UK Health and Safety Executive tore-perforate virgin oil zones in the Lidsey-1 well and this work will takeplace once final approvals have been granted. Lidsey has a fully permitted and operational 2,000-barrel storage facility andits 38 API oil is regularly trucked and sold to the Perenco Oil Refinery. In March 2014, DOR announced that RPS had independently assessed that, as at 31December 2013, the Lidsey Field contained 9.52 million barrels (gross) of P50best case Oil In-Place. In addition, Angus Energy had previously advised that the drilling of the newLidsey-2 well was to be drilled during April and May 2014. The drilling of thisnew Lidsey-2 well has now been postponed until after the Lidsey-1 wellre-completion has been completed. -END- For further information, please contact: Doriemus plc +44 (0) 20 7440 0640Donald Strang / Hamish Harris Sanlam Securities UK Limited +44 (0) 20 7628 2200Nominated Adviser and BrokerSimon Clements / Virginia Bull