Additional information on OPL, and the wide range of advertising opportunities that are to be found on all the media we offer is available by contacting the OPL offices below or by visiting www.oilpubs.com

Ledbury office Clarksons Research Services P.O. Box 11 Ledbury, Herefordshire HR8 1BN United Kingdom	Main office Clarkson Research Services Limited St Magnus House 3 Lower Thames Street London EC3R 6HE,
Tel: +44 (0)1531 634563 Fax: +44 (0)1531 634239 E-mail:opl@oilpubs.com	Tel: +44 (0) 20 7334 3134 Fax: +44 (0) 20 7522 0330 E-mail:sales@crsl.com