Judicial review – Availability of remedy. The first defendant Transport for London (TfL) decided not to allow the claimant Christian organisation's advertisement to appear on its buses on the basis that it was contrary to its advertising policy. The claimant sought judicial review on the basis that the decision had been made for the improper purpose of advancing the second defendant Mayor's electoral campaign. The Administrative Court, in dismissing the application, held that the decision had been made by TfL, although strongly influenced by the Mayor's views and wishes. However, the Mayor had not been motivated by the improper purpose of advancing his election campaign.