Try
http://www.caa.co.uk/docs/33/LASORS_06_WEB.pdf
This is the bible on UK licensing and will definitely answer your question.
From memory, you will need to complete sufficient training to complete the JAR PPL skills test and possibly take a couple of exams, though I seem to remember something about your TT too (less than 100 hours TT made a difference...)
As I say, LASORS will tell all.
Just looked it up - read section C1.2 and C1.3