If your child is between 16 months and 5 years, you could try Bermondsey Community Nursery, Gainsford St (just behind Shad Thames). They have some free places available, just call Marlene or Paulette on 0207 407 4601. My child is there, and it's a great, friendly place.
Southwark council should keep a list of registered childminders you could try and see who has vaccancies and they should be able to give you references.
You don't say where you live so recommending a nursey is difficult. My son went to Little Acorns in SE16(a few years ago now) which he loved and I believe they have expanded to take younger children. You will probably find most nurseries have a waiting list however
And there was a thread on here earlier this year, where people did a fairly comprehensive review of the various nurseries in the area. (If you press "search" at the top of this msg thread, you'll soon get to it).