I can't speak for the whole of the UK but where I am based they are as far as I know no instructors without work.
In fact one chap got his ticket only a couple of weeks ago and was offered two full time positions - One before he had even passed the checkride.
I also know of two other schools who have part time vacancies.
Last edited by Mickey Kaye; 21st Jun 2012 at 12:58.