Bluestars if you agree that admissions will stretch across the borough serving children who have no choice of a good school then why would more be going private?
I don´t know any Whitton/Heathfield parents who would choose a local school that requires improvement over a school located just down the road that was good/outstanding. We would be doing our children a disservice if we didn´t make that decision for them.
There is going to be a significant impact on the academies, unless as you say the admissions policy ´lessens the impact´. If by lessen the impact you mean that the TH admission policy only allows a small number of Whitton/Heathfield families then the rest are left with only TA. Twickenham, parts of South/East Whitton and parts of Fulwell will have the additional choice of the Richmond College School.
Therefore, children living in Heathfield and parts of North/West Whitton will be the ones lessening the impact. In terms of lessening the impact on HA, that will probably be North Hampton children I´d imagine as they are the furthest from both the Teddington/Fulwell admissions point and the school site.
The map on p15 of this document shows the particular areas of the borough and it is easy to understand why some of those parents living in those areas and others would feel that the TH admissions policy is excluding them and therefore is discriminatory and why others may sympathise with them. www.richmond.gov.uk/child_poverty_strategy_2014-17.pdf
The areas of Hounslow Borough to the North and West of Heathfield TH School site have areas with even higher levels of child poverty than within Richmond borough. Those parents really don´t have the option of going private.
These are the parents who would need a local school within walking distance because they simply cannot afford to pay for public transport for their children to travel to school every day and may not even own a car themselves.
I don´t think that LBRUT is happy to have not-so-good secondaries on it´s patch at all. Imagine if Twickenham Academy were given an outstanding rating by Ofsted then everyone would be desperate to get their DC in and would be attracting local families from West Twickenham and Fulwell in addition to Whitton and Heathfield.