Try this site, the prices are at the bottom.
http://www.busybees-nurseryschool.co.uk/...
i am a preschool leader and we have 2 1/2 hr sessions at a cost of £6.50 per session for 2 1/2 yr olds to 3. the start of the term after the child turns 3, they are entiltled to 5 sessions a week free, due to the governments free education grant. this grant can laso be used to claim a reduced rate at a full day care nursery. my pre school is in walthamstow, london