I do! I used to run it, until this term and its lovely.
In St Andrews Church, Thornhill Square Islington. Just a selection of toys, cup of tea and a natter. Very friendly and pretty low key.
There is also Rainbows which is in All Saints church on the corner of Carnegie Street and Caledonian Road. Little bit noisier, more "big" toys, also painting and stuff (more like a playgroup I think)
Both run from 10-12