Gumtree also resulted in a very good nanny indeed for us - possibly less grand than the ones who read the Lady, but highly competent. About one in ten of the replies you get is likely to be any good, but you get loads, so that's plenty. 2 or 3 months in advance. Nanny sharers are surprisingly not so easy to find though,unless someone you know would like to do it, so it's probably a good idea to start looking round for someone to share with as soon as you possibly can, and it may work well to select with them as you then both feel equally involved from the outset in making important decisions.