Our son passed the 11+ and our 1st choice is Dr Challoner's, followed by Chesham Grammar School. We live in Chalfont St Peter, close to the Epilepsy Centre. Do we have a good chance of getting him into Dr Challoner's ? I guess we are in the catchment area but the map provided by Dr Challoner's is not very clear. We moved in CSP a few years ago and we are not very familiar with the catchment area concept. Thanks.