Trading on PLUS Markets

Rockhopper Exploration plc 01 August 2007 1 August 2007 Rockhopper Exploration plc Rockhopper Exploration shares begin trading on PLUS Markets Rockhopper Exploration plc (the Company) is pleased to announce that its ordinary shares have been admitted to trading on PLUS Markets (under the same trading symbol as on AIM: RKH). PLUS Markets is an independent London-based equity market service, provided by PLUS Markets Group plc, which was recently approved as a Recognised Investment Exchange. PLUS Markets is based on a quote-driven trading system and currently trades over 900 small and mid-cap company shares representing a combined market capitalisation of around GBP200 billion. The Company's ordinary shares will continue to be quoted and traded on AIM. Rockhopper Exploration's Managing Director, Sam Moody, commented: 'PLUS Markets provides a route, in addition to AIM, for investors to trade in Rockhopper shares and is intended to enhance investor choice, improve liquidity for shareholders and provide greater access to investors.' For further information, please contact: Rockhopper Exploration plc www.rockhopperexploration.co.uk Sam Moody - Managing Director 01722 414 419 Teather & Greenwood Limited Tom Hulme - Corporate Finance 020 7426 9000 Aquila Financial Ltd www.aquila-financial.com Peter Reilly 020 7202 2601 Yvonne Fraser 020 7202 2609 Notes to editors www.rockhopperexploration.co.uk The Rockhopper Group started trading in February 2004 to invest in and carry out an offshore oil exploration programme to the north of the Falkland Islands. The Group, floated on AIM in August 2005, is currently the largest licence holder in the North Falkland Basin and has a 100 per cent. interest in four offshore production licences which cover approximately 5,800 sq. km. These licences have been granted by the Falkland Islands government. This information is provided by RNS The company news service from the London Stock Exchange