Can a moderator please settle this ?
In a nutshell, you are right and they are wrong.
For Challoners Girls they need to submit proof of their address on 12th November 2010, ahead of the test results on 26th November. So, wherever they are currently living is the address on which the school allocation will be based. DCHS is usually only able to offer place to girls in catchment.
For the boys school they introduced these rules this year to prevent address fraud (Rule 2 is distance from the school):
a) In order to qualify for admission under Rule 2, the applicant must have been resident within the catchment area continuously since April 1st of the year preceding proposed admission.
b) If a family still owns a property within 20 miles of the school, a leased property closer to the school will not be accepted as the basis for a legitimate residence qualification even if the former property is leased to a third party.
The full admissions policy can be viewed here, but apart from the above rules, it is the same as for all Bucks Grammars for Year 7 admissions: http://www.challoners.com/index.aspx?se ... ons-policy
Anyone applying for admission in September 2011 needed to be living in catchment and within the usual allocation distance of around 6 miles by April 1st 2010.
I am afraid the people you have been talking to are living in cloud cuckoo land.