The following amendment has been made to the 'Acquisition Update - Horse Hill-1' announcement released on 10 June 2017 at 7:00am under RNS No. 5219K

The original announcement stated that the effective date of the Regency transaction is 28 June 2016 when it should have been 28 June 2017.

All other details remain unchanged.

The full amended text is shown below.

UK Oil & Gas Investments PLC

("UKOG" or the "Company")

Agreement to Acquire a further Interest in Horse Hill-1 Oil Discovery and Licences, Weald Basin, UK

UK Oil & Gas Investments PLC (London AIM and ISDX: UKOG) announces that it has agreed to acquire a 1.9% shareholding in Horse Hill Developments Ltd ("HHDL") from Regency Mines plc ("Regency"). On completion, the Company will hold a 32.435% beneficial interest in the onshore Weald Basin licences PEDL137 and PEDL246 ("the Licences").

The Licences, covering an area of 55 square miles (143 km²) north of Gatwick Airport, contain the Horse Hill-1 ("HH-1") Portland sandstone and Kimmeridge Limestone oil discoveries. As previously reported on 21 March 2016, HH-1 flow tested at a significant commercial aggregate stable dry oil rate of 1,688 barrels of oil per day. Regulatory permissions are being sought for a significant long-term production testing and appraisal programme of the productive Kimmeridge Limestone and Portland reservoirs.

Transaction Summary

For a total consideration of £323,000, the Company will receive a further 1.235% beneficial interest in the Licences via the purchase of Regency's 1.9% shareholding in HHDL. The total Consideration, with an effective date of 28 June 2017, is comprised of £54,498 payable in cash and £268,502 in the form of the issue of new ordinary shares in UKOG ("Consideration Shares"). The Consideration Shares are calculated on the 30-day volume weighted average price prior to 29 June 2017. Completion of the acquisition is conditional on the consent of HHDL. A further announcement will be made on completion.

HHDL and the Company's Interest in the Licences

HHDL is a special purpose vehicle, which owns a 65% working interest and operatorship of the Licences. UKOG on completion will own a 49.9% beneficial shareholding in HHDL, which equates to a 32.435% net working interest in the Licences. The remaining 35% interest in the Licences is held by Magellan Petroleum (UK) Limited.

Following communications with Surrey County Council ("SCC"), we now understand the Horse Hill planning application will be determined at the scheduled SCC Planning Committee meeting of either August or September 2017. The planning application seeks consent to long-term production test HH-1 and to drill two further wells. The Company's plans remain unchanged in that HH-1 testing will directly follow the BB-1 flow test operation, with an HH-1 start expected in Q4 2017.

Stephen Sanderson, UKOG's Executive Chairman, commented:

"This acquisition fits perfectly within UKOG's stated strategy to further consolidate and increase its holdings in the Kimmeridge oil play in the Weald. The licences remain a significant part of UKOG's extensive Kimmeridge portfolio, containing both the HH-1 oil discovery and its likely continuation across much of the licenced area.

In addition to HH-1 Kimmeridge oil, the Portland oil discovery remains a significant potential early monetisation asset, which, given the 323 bopd test rate, we believe has a high chance of commercial viability.

Given a successful production test outcome, both the Kimmeridge and Portland remain on course for stable oil production by end 2018/early 2019."

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 / Kiran Morzaria Tel: 01483 243450

WH Ireland (Nominated Adviser and Broker)

James Joyce / James Bavister Tel: 020 7220 1666

Cenkos Securities PLC (Joint Broker)

Nick Tulloch / Neil McDonald Tel: 0131 220 6939

Square 1 Consulting (Public Relations)

Brian Alexander / David Bick Tel: 01483 243450 / 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
production test or extended flow test	a long test period usually up to 6 months where hydrocarbons are flowed to surface through a test separator. Key measured parameters are oil and gas flow rates, downhole pressure and surface pressure. The overall objective is to identify the well's capacity to produce oil at a commercial flow rate and to recover oil in commercial quantities or volumes
limestone	a sedimentary rock predominantly composed of calcite (a crystalline mineral form of calcium carbonate) of organic, chemical or detrital origin. Minor amounts of dolomite, chert and clay are common in limestones. Chalk is a form of fine-grained limestone, being made of the remains of calcareous planktonic algae called coccoliths. The Kimmeridge Limestones are comprised of fine grained coccoliths, fine grained calcium carbonate mud, clay minerals, together with dark grey organic matter.

UKOG Licence Interests

The Company has interests in the following ten UK licences:

Asset	Licence	UKOG's Interest	Licence Holder	Operator	Area (km²)	Status
Avington ¹	PEDL070	5%	UKOG (GB) Limited	IGas Energy Plc	18.3	Field in stable production
Baxters Copse ²	PEDL233	50%	UKOG Weald Limited	IGas Energy Plc	89.6	Appraisal/development well planned; licence extended to 2018
Broadford Bridge ³	PEDL234	100%	Kimmeridge Oil & Gas Limited ⁴	Kimmeridge Oil & Gas Limited ⁴	300.0	BB-1 drilling underway
Holmwood ³	PEDL143	30%	UKOG	Europa Oil & Gas (Holdings) plc	91.8	Holmwood-1 exploration well planned in 2017
Horndean ¹	PL211	10%	UKOG (GB) Limited	IGas Energy Plc	27.3	Field in stable production
Horse Hill ⁵	PEDL137	32.435%	Horse Hill Developments Ltd ^⁶	Horse Hill Developments Ltd ^⁶	99.3	Submitted planning application for long term production tests and drilling of two wells
Horse Hill ⁵	PEDL246	32.435%	Horse Hill Developments Ltd^⁶	Horse Hill Developments Ltd ^⁶	43.6	As above
Isle of Wight (Offshore) ³	P1916	100%	UKOG Solent Limited	UKOG Solent Limited	46.7	Preparing drilling planning submission
Isle of Wight (Onshore) ^{2, 3}	PEDL331	65%	UKOG	TBA	200.0	Preparing drilling planning submission
Markwells Wood ²	PEDL126	100%	UKOG (GB) Limited	UKOG (GB) Limited	11.2	Submitted planning application for appraisal and field development

Notes:

1. Oil field currently in production.

2. Oil discovery pending development and/or appraisal drilling.

3. Exploration asset with drillable prospects and leads. Contains the extension of the Godley Bridge Portland gas discovery and the site of the forthcoming Broadford Bridge-1 well.

4. UKOG has a 100% interest in Kimmeridge Oil & Gas Limited, which has a 100% interest in PEDL234.

5. Oil discovery with recently completed flow testing.

6. UKOG has a direct 48% interest in HHDL, which has a 65% interest in PEDL137 and PEDL246.

The information contained within this announcement is deemed by the Company to constitute inside information under the Market Abuse Regulation (EU) No. 596/2014.