Membership of Professional Bodies
- Member, ESA Solar System Working Group, January 2000 - December 2002
- Chairman, ESA Solar System Working Group, January 2003 - June 2005
- Member, ESA Space Science Advisory Committee, January 2003 - June 2005
- Member, PPARC Science Committee, June 2001 - September 2002
- Chairman, PPARC Solar-B Steering Panel, November 1998 - June 2001
- Member, PPARC Space Science Advisory Committee, January 2000 - June 2005
- Editor, Reviews of Geophysics, December 1st 2000 - December 31st 2004
- Vice - President, Royal Astronomical Society, May 1999 - May 2001