Sunday 20 June 2010 11.16am
I WAS trying to be helpful, but was posting from my phone (on which I can't work out how to copy and paste links).
So, I did a quick google search for nurseries in SE1, and found, not only the websites for all the local nurseries, but also (very high up on the list of results) a forum discussion on this very site.
The time I spent looking, was, I calculate, less time than OP might have spent typing her post above.
And if OP wants personal recommendations, she only needs to ask. For instance, I know people who are very happy with both The Arc, and Bright Horizons, Tabard Sq.
...if you press it, they will come.