"The cause of reform, so long fought for, cannot afford to have the fundamentally fair and historic principle of majority voting cast aside, " the historians write.

BBC: AV referendum: Union stance 'depressing', says Johnson

Google claimed at the time it was protected by the "fair use" principle because its book search engine showed only short snippets of text for the books it had scanned without permission.

BBC: Judge delays Google books hearing

The overall principle that he supports the need for wealthy Americans to pay their fair share I think has been established many times by him in a variety of forums.

WHITEHOUSE: Press Briefing

Tunisia's President Moncef Marzouki had promised earlier this year to hand over Mr Mahmoudi if he were guaranteed a fair trial, but in May he said he was in principle opposed to the move.

BBC: Tunisia extradites Libya ex-PM Mahmoudi