Sarah Dunkin Department of Physics & Astronomy University College London Gower Street London WC1E 6BT Tel: 0171 380 7146 Fax: 0171 380 7145 Email: skd@star.ucl.ac.uk Emma Taylor Unit for Space Sciences and Astrophysics University of Kent at Canterbury Canterbury Kent CT2 7NR Tel: 01227 764000 ext.3834 Fax: 01227 762616 Email: eat1@ukc.ac.uk