I have two children who are moving school next year.  I haven't fretted about where my precious ones were going to be educated for several years - but the uber-competitive London day school market can frazzle the nerves of even the calmest parent. 

For incredibly detailed, up to the minute objective advice you can't do better than the Good Schools Guide.  For £9.99 a month, you have complete access to their fully updated online service complete with interactive catchment area maps, results and those fantastic honest 'warts and all' reviews.

goodschoolsguide.co.uk