Uk Oil & Gas Regulatory News (UKOG)

UK Oil & Gas Investments PLC

("UKOG" or the "Company")

Further Update on Horse Hill-1 Flow Test

Portland Zone Flows Oil at a Sustained Rate of 168 Barrels Per Day

UK Oil & Gas Investments PLC (London AIM and ISDX: UKOG) announces that Horse Hill Developments Limited ("HHDL") has informed the Company that 37-degree API, light, sweet, dry (99-100% oil) crude has flowed to surface, via rod pumping, at an average stabilised rate of 168 barrels per day over a continuous 9-hour period. The flow is from an 103-ft aggregate perforated zone within the Upper Portland sandstone interval at a depth of approximately 615 metres below ground level. Maximum flow during this test period was restricted by the initial rod pump configuration. The flow test will now continue with a pump configuration designed to permit optimal flow over a longer flow period.

The Horse Hill-1 ("HH-1") well has now produced at a combined average stable rate of over 1,528 bopd from the two Kimmeridge and Upper Portland zones.

It should be noted that the only commercial Upper Portland oil production in the Weald Basin is from the nearby Brockham field, 8 km to the northwest of HH-1, in which the Company has an indirect 3.6% interest. The Brockham field was discovered by BP in 1987 and flowed 28-degree API oil on an extended well test in 1988, at a maximum stabilised rate on pump of 117 bopd. A subsequent extended well test in 2001, prior to commercial production, produced oil at an average pumped rate of approximately 140 bopd.

Horse Hill-1 Discovery Well and Licence

The exploration drilling phase of the HH-1 discovery well was originally completed at the end of 2014. The well is located within onshore exploration Licence PEDL137, on the northern side of the Weald Basin near Gatwick Airport. UKOG owns a 19.968% interest in PEDL137.

Stephen Sanderson, UKOG's Executive Chairman commented:

"The Horse Hill well still continues to flow and perform above management's expectations. Higher flow rates and markedly better crude quality than the Upper Portland oil from the nearby Brockham field make the HH-1's commercial prospects very real. We look forward to the results from the optimised pumping programme."

UKOG's Interest in Horse Hill

The HH-1 well is located within onshore exploration Licence PEDL137, on the northern side of the Weald Basin near Gatwick Airport. UKOG owns a 30% direct interest in HHDL and a 0.72% 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 PEDL137 and the adjacent Licence PEDL246 in the UK Weald Basin.

Qualified Person's Statement:

Stephen Sanderson, UKOG's Executive Chairman, who has over 35 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

Stephen Sanderson / Jason Berry 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 / Brian Alexander Tel: 020 7929 5599

Glossary

Notes to Editors:

The Company has interests in the following UK licences: