The mitsubishi guys, hope they're somewhere near you
http://www.mitsubishivehiclerental.co.uk/
"The towns we cover are: Bristol, Kingswood, Thornbury, Patchway, Clifton, Knowle, Keynsham, Cheltenham, Gloucester, Tewkesbury, Winchcombe, Brockworth, Chertsey, Staines, Kingston, Chessington...