To be an explorer you will need:

A Beige shirt
Activity Trousers
Scout Belt and Buckle

These Items can be purchased from:

The Scout Shop
Banbury Distrct Scout Shop -6th Banbury Scout HQ, Ruskin Road, Banbury (read of Banbury School)
Chez Rama, 9-11 Clemens Street Leamington Spa Warwickshire CV31 2DW

or on line at http://www.scoutguidestore.co.uk/103-explorer-scouts