You need to check the admissions criteria, or talk to the admissions team at Bucks County Council. DCGS has very specific rules about addresses and you have to be resident for quite some time before applying (check the admission criteria, they will be on the school website). You would not get in from West London.
You seem to be firing off queries about a variety of schools. Have you visited them?
DCGS
admissions policyIn particular:
Quote:
Normal Home Addressa)In order to qualify for admission under rules referring to the school’s catchment area, the applicant must have been resident at their home address continuously since April 1st of the year preceding proposed admission (for admission in September 2020this is April 1st 2019) b)If a parent of the applicant student still owns a property within 20 miles of the school which has been the main family home more recently than September 1st 2016 (ie 4 years before the proposed date of admission), a 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.For the purposes of this policy a parent of an applicant is defined as a parent with whom the applicant student resides for at least two nights of the school week (Sunday to Thursday inclusive)c)The school may require additional evidence of ‘residence qualification’ if there are reasons for casting doubt on the accuracy or completeness of an application.