Immigration – Leave to remain. The claimant Thai national's application for leave to remain in the United Kingdom was refused on the basis of an unspent criminal conviction. The Administrative Court, in dismissing the application, held that, inter alia, the Secretary of State had been entitled to take the new Immigration Rules into account, notwithstanding that the application had been made prior their entry into force. Further, the Secretary of State had not acted perversely or irrationally.