A teacher who used crack cocaine and fell asleep both in lessons and on a school trip to the zoo has been allowed to return to his job.

William Horseman, who now works at Merchants’ Academy in Bristol, admitted being a crack user while teaching at The Ridings High School, in Winterbourne near the city.

The General Teaching Council for England found Mr Horseman guilty of unacceptable professional conduct, but allowed him to return to the classroom with a conditional registration order.

He must report to the council three times a year for the next two years confirming that his conduct has been satisfactory.