UK Oil & Gas Investments PLC

("UKOG" or the "Company")

Drilling Update at 100% Owned Broadford Bridge-1 Kimmeridge Exploration Well

PEDL234 Licence, Weald Basin, UK

UK Oil & Gas Investments PLC (London AIM and NEX: UKOG) announces that it has now drilled and cased-off the 12¼ inch hole section of its 100% interest Broadford Bridge-1 ("BB-1") exploration well. BB-1 has reached a measured depth of over 830 metres and is now drilling ahead in 8½ inch hole towards the objective. An extensive conventional coring programme within the target Kimmeridge Limestone section is planned to commence next week. The well is now under budget and remains on schedule.

About BB-1

BB-1 is located near Billingshurst, West Sussex, within the 300 km² PEDL234 licence, in which the Company has a 100% interest via its ownership of the licence's operator, Kimmeridge Oil & Gas Limited. The well, an exploration step-out, is designed to penetrate four naturally fractured Kimmeridge Limestone units (KL1-KL4), the uppermost two units of which flowed at record rates in the Company's Horse Hill-1 discovery near Gatwick Airport.

The well will now continue to drill at a consistent inclination of 54 degrees to vertical and at approximately 90 degrees to the predicted orientation of open natural fractures in the KL1-KL4 reservoir section. The planned overall horizontal deviation of the well is approximately 1 km to the north-northeast of the well site. The Kimmeridge Limestones are expected to be encountered at a drilled depth of approximately 1300-1700 metres, which equates to around 950-1200 metres vertically below surface.

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:

casing	heavy gauge steel tubing designed to line the wall of a well. The casing provides a safe controlled space in which the drill pipe and bit can operate in isolation from conditions in overlying rock units. The steel tubing is bonded to the surrounding rock by impermeable concrete, known as "cement".
core or coring	a drilling technique that involves using a doughnut-shaped drilling bit to capture or "cut" a continuous cylinder-shaped core of undamaged in-situ rock. The core is captured in a steel pipe or "core barrel" above the bit. Core is normally cut in 30 feet lengths, or multiples of 30 feet, and normally with a diameter of 3.5 or 4 inches. Core is taken in petroleum reservoir rocks for detailed laboratory analyses of petrophysical and geomechanical parameters.
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
electric logs	tools used within the wellbore to measure the rock and fluid properties of surrounding rock formations
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
naturally fractured reservoir	a fractured reservoir contains open and usually connected cracks or fissures within the rock matrix; fractures can enhance permeability of rocks greatly by connecting pore-spaces together; naturally fractured reservoirs have been created over geological time by nature, not man-made via hydraulic fracturing
step-out well	a well specifically designed to determine the lateral extent of a discovered hydrocarbon accumulation or play.

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	31.2%	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	31.2%	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.