Rockhopper Exploration plc (AIM: RKH), the oil and gas exploration and production company with key interests in the North Falkland Basin, is pleased to announce that Rockhopper and Premier Oil Exploration and Production Limited ('Premier') have signed a detailed Heads of Terms with Navitas Petroleum LP ('Navitas') to farm in for a 30 per cent interest in the Sea Lion project (the 'Transaction').

In addition, Rockhopper and Premier have agreed certain amendments to their existing commercial arrangements.

Highlights

Working interests aligned across the Sea Lion licences PL032, PL004b and PL004c: Premier 40% (Operator); Rockhopper 30%; Navitas 30%

Adds additional strength to the Sea Lion joint venture which Rockhopper believes will increase the likelihood of a successful senior debt project financing for the Sea Lion Phase 1 development

Rockhopper's costs for the Phase 1 development (not met by senior debt) to be met by a combination of carry and loans from Premier and Navitas from 1 January 2020 to Phase 1 Project Completion (estimated to occur 9-12 months after first oil)

Greater alignment and simplified commercial arrangements across the joint venture

Rockhopper maintains material share of Phase 1 project NPV, a significant 30% interest in Phase 2 Sea Lion development, and additional upside from the Isobel-Elaine area (PL004a)

Contingent consideration payable to Rockhopper by Premier and Navitas of up to US$48 million related to future phases of development in the North Falkland Basin

Finalisation of a Sale and Purchase Agreement is expected during Q1 2020 ('SPA Signing') with completion subject to satisfaction of certain conditions including regulatory approval, expected in Q2 2020 ('Farm-in Completion')

Samuel Moody, CEO of Rockhopper, commented: 'This is a very important milestone both for the Sea Lion project as a whole and Rockhopper itself. We will be delighted to welcome Navitas to the Sea Lion project and regard their joining as an important catalyst as well as industry endorsement of Sea Lion's scale (independently audited 2C resources of c.520 mmbbls) and potential (NPV10 at first oil c.$4bn). Navitas add valuable offshore experience from their Gulf of Mexico projects and hugely successful prior personal involvement in Israel's offshore sector. They also materially strengthen and enhance the prospects for a successful project financing, as clearly demonstrated by their success in funding other similar developments elsewhere in the world and with proven access to capital markets.

'Furthermore, we are obviously very pleased to announce that all of our project costs are being covered from the start of 2020 and in the event of a successful sanction that they will continue to be covered through to Phase 1 Project Completion (estimated 9 - 12 months after first oil) while maintaining a very material 30% stake in the Sea Lion project along with additional upside in the PL004a licence containing the Isobel discovery. This transaction will therefore materially strengthen the Company financially.

'Discussions are continuing to progress with senior lenders regarding project financing and should be positively supported by the Transaction. We will update the market on the progress of those discussions in due course.

'Our arrangements with Navitas are at a detailed non-binding Heads of Terms stage and we look forward to working with them to put in place formal binding documentation in the coming months. In the intervening period, we are pleased that Premier has separately agreed funding arrangements for all of Rockhopper's costs on Sea Lion.'

Details of the Heads of Terms

Working interests

Working interest in Sea Lion licences PL032, PL004b and PL004c to be aligned: Premier 40% (Operator); Rockhopper 30%; Navitas 30%.

Phase 1 funding

The joint venture will continue to pursue a senior debt project finance (or similar) to fund the Phase 1 development of Sea Lion.

Existing funding arrangements between Rockhopper and Premier are to be replaced such that Rockhopper is funded for all pre- and post-sanction costs not met by senior debt by Premier and/or Navitas through a combination of carry and loans.

Premier will carry all of Rockhopper's costs from 1 January 2020 to 1 March 2020 (being the effective date for the Transaction) and on a bridging basis pending completion of the Transaction (the 'Carry').

Premier and Navitas will fund all of Rockhopper's project development costs (excluding production area licence fees and taxes) from 1 March 2020 to Phase 1 Project Completion (estimated to occur 9-12 months after first oil) through an interest free loan ('Loan'). Funds drawn under the Loan will be repaid from 85% of Rockhopper's working interest share of free cash flow.

An additional standby loan ('Standby Loan') will be available from Premier to cover Rockhopper's share of production area licence fees and any Capital Gains Tax liability. This new Standby Loan will attract interest at a rate of 15% per annum and will be repaid from Rockhopper's residual share of Phase 1 free cash flow.

Phase 2 consideration and funding

Existing funding arrangements between Rockhopper and Premier will be replaced such that, subject to certain conditions, Rockhopper will receive contingent payments of up to US$36 million from Premier and Navitas' share of Phase 2 cash flows, linked to the achievement of certain production and oil price milestones.

PL004a - Isobel Elaine

Rockhopper has granted Navitas and Premier an option to acquire working interests in PL004a (30% and 4% respectively) to align working interests across PL032 and PL004. The option must be exercised by Navitas within 8 years of completion of the Transaction, or the date of Phase 2 FID ('Financial Investment Decision'). In the event the option is exercised and subject to certain conditions, Rockhopper will receive contingent payments of up to US$12 million from Navitas' and Premier's share of Phase 3 cash flows, linked to the achievement of certain production and oil price milestones.

Area of Mutual Interest Agreement ('AMI')

It is intended that Navitas will become a party to the AMI entered into between Rockhopper and Premier in 2012 in relation to future joint exploration activities in the Falkland Islands area.

Conditions and withdrawal right

Conditions to SPA Signing (target Q1 2020): Completion of Navitas due diligence

Agreement of Definitive Transaction Documentation and associated Phase 1 project documents (including but not limited to Joint Operating Agreement, joint venture Financing Agreement, joint venture Marketing Agreement, Decommissioning Security Agreement, Field Security Agreement)

Conditions to closing of Transaction ('Farm-in Completion') (target Q2 2020): Falkland Islands Government approval for the transaction

Following Farm-in Completion, but prior to 1 April 2021, Navitas can exercise a withdrawal right, subject to certain conditions including in the event that Phase 1 FID has not occurred.

In the event that Navitas' board has failed to take a positive Phase 1 FID by 1 April 2021, or otherwise fails to secure its share of funding, Premier may elect to remove Navitas.

In the event that either Navitas elects to withdraw or Premier elects to remove Navitas, Premier will have the option to step into the Navitas arrangements, or, in the very unlikely event, implement a wind down of the project which could ultimately result in relinquishment of the acreage. In either event, Rockhopper is liable for its share of project wind down costs with no funding support from Premier and/or Navitas and if Premier does opt to wind down the project then Rockhopper has the right to acquire Premier's interest and become 100% working interest licence holder and Operator of licences PL032, PL004a, b and c, subject to all necessary regulatory approvals.

Contact:

Tel: +44 (0) 20 7390 0234

About Navitas

Navitas Petroleum LP ('Navitas') is a publicly traded (TASE:NVPT.L) North America focused oil and gas exploration and production partnership.

Navitas has an established asset portfolio, including: conventional onshore production (Neches field and Denbury assets (latter closing in March 2020)), robust offshore production (Buckskin project), development stage assets with a clear path to first production (Shenandoah project) and high-impact exploration prospects (Block 7, offshore Canada). Navitas has over 225 million barrels of 2P/2C resources and an existing work programme in place to increase production to over 40,000 bbls/d by 2023. Navitas' 2020 EBITDA is estimated to be in the region of $60 million and projected to increase to approximately $540 million by 2024.

Navitas' Chairman is Mr Gideon Tadmor, one of the founders and major drivers behind the success of the Eastern Mediterranean oil and gas sector. As the CEO and Chairman of Delek Group's upstream companies, Mr Tadmor led the efforts of world class discoveries such as the 11 TCF Tamar field and the 22 TCF Leviathan field.

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