1. Enterprise Oil plc, Grand Buildings, Trafalgar Square, London WC2N 5EJ, UK (e-mail:helen.naylor@london.entoil.com)
2. Department of Geology and Applied Geology, University of Glasgow, Lilybank Gardens, Glasgow G12 8QQ, UK
3. Centre for Palynology, University of Sheffield, Dainton Building, Brook Hill, Sheffield S3 7HF, UK
4. Mobil North Sea Limited, Mobil Court, 3 Clements Inn, London WC2B 2EB, UK
5. Statoil E&P A/S, Sankt Anne Plads 13, DK-1298, Copenhagen, Denmark