"Hackney has a lower proportion of high attainers amongst the general secondary school population compared to Westminster. Mossbourne's figure is well above the average for the LA. Also, as per my last post, faith schools will tend to attract the kind of parents who are likely to have high achieving children. I am not saying this is how things should be, just that the high figure for high attainers at this school does not necessarily mean there is any wrong doing."
No, I'm not saying that they have done anything wrong, just pointing out that the fair banding combined with religious selection is resulting in a skewed intake.
I'm not sure where you find the high attainers stats, I had a look:
St Marylebone (Girls, C of E): 74/148 (50%)
Grey Coat (Girls, C of E): 79/153 (52%)
Westminster Academy: (distance based) 25/176 (14%)
Paddington Academy (distance-based): 29/173 (17%)
Pimlico Academy (distance-based): 36/201 (18%)
Quintin Kynaston (distance-based) 54/206 (26%)
St Augustines (C ofE, but not oversubscribed): 17/118 (14%)
St Georges (Catholic but undersubscribed): 25/116 (22%)
Westminster City (Christian in theory, but undersubscribed in practice): 26/114 (23%)
So out of 1405 children in Westminster state secondary schools, 365 are 'high attainers', which is 25.9%
Appeals to the schools in 2013 were:
St Marylebone: 71
Grey Coat: 50
Paddington: 24
Pimlico: 1
Quintin Kynaston: 0
St Augustines: 0
St Georges: 0
Westminster Academy: 0
Westminster City: 0
So as you can see the two girls C of E schools are by far the most sought after.
I don't know what the break down of high attainers between girls and boys is, in theory it should be 180 of each, which in theory means that something like 85% of Westminster's brightest girls are at two schools. Of course in practice they will draw from outside Westminster, but you can see that most of the schools don't really have enough children to put together a proper top set, whereas both the C of E girls schools have got plenty of bright girls to teach Latin etc.
Excluding the two super-selective C of E schools, the overall % of high attainers is 19.2%.
Looking at Hackney:
Cardinal Pole RC 15/165
Clapton Girls 28/172
Haggerston 11/173
Lubavitch 10/18
Mossbourne 52/188
Our Lady's Convent 27/117
Stoke Newington 74/242
The Bridge Academy 27/182
The Petchey Academy 41/178
The Urswick Academy 12/132
Yesodey Hatorah 9/44
So 306 out of 1631, about 18.8%, or 17.6% if you exclude Mossbourne. So Mossbourne has about 50% more high attainers than it should, if you consider the rest of the borough, but the two girls C of E schools in Westminster have about 170% more high attainers than they should.
"The fair banding test will be a form of IQ test but the test for languages should be different. This must test specifically for aptitude in languages, not general intelligence. "
Aptitude in languages IS a form of IQ test. They will be massively correlated. Ok you are testing language aptitude, but ultimately it's an intelligence test. It's not like they are finding out who is the fastest to run 100 metres.
And you can certainly practise for them, I don't know if it helps I can't imagine that it wouldn't though.