Try bleeding system again failing that, could be sleeve cylinder or master cylinder. If you are competant both easy to fit. Get a haynes manual from halfords and it has step by step guide to replacing and bleeding.

Hi every one new to this game but thought id say hi anyway. The names Jamie excuse the id I chose but Slut was taken lol. Oh I have an intermittant electrical fault on my discovery 1 that is annoying the cak out of me. If anyone wants bored with the details and can maybe help id much...