I think hamptonhillbilly is confusing Year 7 numbers with total Years 7-11 numbers. The document here (scroll to end) from the council gives numbers of pupils in each Catholic primary school transferring to community primary schools.
By the way, good point that if the link system is removed, more Catholics may voluntarily choose e.g. Orleans than at present even if there was a VA school.
However, only 7 pupils from Sacred Heart are likely to be taking up one of the 200 Year 7 places at Teddington, while about 15 from St James's are likely to be going to Waldegrave (also 200 places).
Also, check out this article in the evening standard about the crisis in places due to impact on secondary schools by 2014. It is likely that Hounslow and Wandsworth pupils will become increasingly interested in our academies. I do not understand where the '200 places in academies' figures comes from unless this is also a confusion of Year 7 and Years 7-11 - see offer numbers here and below which suggest that only 41 Year 7 places were unfilled, unless lots dropped out. And Hampton Academy seems to be oversubscribed even now.
I've pasted the collated stats below if you don't have time to follow the links.
YEAR 7 PLACES
Christ's ? 120 places, 140 offers
Grey Court ? 240 places, 261 offers (NB: will reduce to 200)
Hampton Academy ? 210 places, 226 offers
Orleans Park ? 200 places, 200 offers
Richm'd Park Acad. ? 220 places, 187 offers
Teddington - 240 places, 240 offers (NB: will reduce to 200)
Twick'm Academy ? 180 places, 172 offers)
Waldegrave ? 200 places, 200 offers
NEW VA 'CLIFDEN RC SCHOOL'??
YEAR 7 pupils = 150
TOTAL PUPILS = 750
NB: TOTAL PRIMARY SCHOOL PUPILS = around 2,200 (about 600 go private or out of borough) - I just added up stated admission numbers.
YEAR 7 secondary pupils:
2010/11 = 1,380
2011/2012 = 1,610 places, 1626 offers
(NB some schools have expanded temporarily but will reduce numbers down by about 200 when sixth forms in place).
FORMER YEAR 6 Catholic primary pupils transferring to
Catholic secondary schools
2010/11 = 219
FORMER YEAR 6 Catholic primary pupils transferring to other secondary schools
2010/11 - 36
Sacred Heart - probably Teddington = 6
St James's - probably Waldegrave = 15)