DOR Doriemus

                                 Doriemus plc

                         ("Doriemus" or the "Company")

                       Update on Horse Hill Prospect, UK

                      Environment Agency Permits Granted

Doriemus Plc (AIM: DOR) announces that Horse Hill Developments Ltd ("HHDL") has
now been granted final approvals from the UK Environment Agency to proceed with
the drilling of the Horse Hill -1 well at Horse Hill in Surrey.

Doriemus has a binding agreement in place to own a direct 10% interest in HHDL,
a special purpose company that owns a 65% participating interest and
operatorship of onshore licence PEDL137 in the Weald Basin.

Donald Strang, the Company's Chairman, commented:

"Recent heavy rainfall in the area has unfortunately delayed the completion of
site construction works, however the concrete cellar is on-site and is ready to
install once the ground conditions allow. We look forward to spudding of this
important Horse Hill-1 well shortly."

The participants in the Horse Hill-1 well are HHDL (Operator) with a 65%
working interest and Magellan Petroleum Corporation with a 35% interest.

Enquiries:

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

Cairn Financial Advisers LLP            +44 (0) 20 7148 7900
Nominated Adviser and Broker
James Caithie/Jo Turner/Carolyn Sansom