im doing my PTS with this firm,
They organise the sponser,and the medical is also in with the cost of doing the course with them.
its a 3 day course
1 day for the medical and 2 days for the PTS course.
it will cost you £360(includes the medical)
Their number is 0208 5211279
Their address is
6 Church Hill
Churchill Business Centre
suite 301
E17 3RY
Walthamstow,East London
(keep trying if you dont get an answer,took me 4 hours on and off before someone picked up)
hope this helps