speak to trevor at ridesure and i'm sure he can help you, his site is on a disused airfield near guildford so there is plenty of room for practice and the route's the test centre use aren't bad plus he preety much knows them all.
you use a kwaka er5 (which i was impressed with) he took me on a ride before my test and then the examiner took me on the same route and hey presto i had passed with 1 minor only.
tel;01403 711122/ 01483 278236/ 0781 0640135
or
www.ridesuretraining.co.uk
hope it comes together for the summer & good luck.