Most refresher courses are aimed at those returning after a career break.
The Teacher Training Agency can provide details of courses that it funds.
Not all of them accept teachers such as yourself, which is a pity, but there are other courses available. Contact the recruitment managers in the authorities where you want to work to see if they know of any.
Alternatively, after scanning The TES, you will get an idea of where the jobs are. Contact some heads and ask to spend a few days in their schools as a volunteer in return for briefings on the changes.