It is very well known amongst local families and schools in these parts that if you have a bright child and go and have a chat with the head, your child may suddenly and unexpectedly be offered a place
If schools in Hackney make offers direct to parents they are breaking the rules. All offers should be made by Hackney Learning Trust (which is part of Hackney Council). But yes, it is known for heads at all types of school to make offers direct to parents without going through the proper process. This does, of course, open the school up to the possibility of successful appeals. If the head admits someone who doesn't qualify for a place and the person at the head of the waiting list finds out they have a cast iron appeal case.
If the offer comes through HLT getting an offer to someone preferred by the head would involve collusion between the head, the governors, the independent supervisor of the random draw and HLT. I'm not saying it can't happen but it is unlikely.
I certainly know of a school near me about which there is a persistent rumour that if you don't get a place during initial allocations you should go and have a chat with the head and he can make sure your child is offered a place before the start of the autumn term. And, of course, every time someone does go and have a chat with the head and subsequently gets a place it is seen as confirming this belief. It is, in fact, complete nonsense. In this particular case the school's involvement with admissions stops before initial offers are sent out. All offers from then until the start of term in September are handled entirely by the LA. If you have a meeting with the head he will smile nicely and tell you that he will see what he can do. But he won't actually do anything. He knows that if he contacts the council and asks them to make sure your child is admitted the answer will be short and to the point.
How on earth did that convert to 70% high attainers
My apologies. I should have dealt with this properly earlier.
The 70% high attainers happened in 2011. Since the data refers to Y11 those pupils entered the school in 2006. At that time HACP was a CTC, not an academy. As a CTC it was not subject to the Admissions Code. I don't know what its admission arrangements were but I'm pretty certain they didn't involve fair banding.
The following year (2007) the school became an academy which meant they had to comply with the Admissions Code. The proportion of high attainers immediately dropped to a level which looks like it is broadly consistent with the output of the local primary schools. So if you really want to look at HACP's performance as an academy you should start with 2012 and ignore everything before that.
I'm not going to get into detail on South Norwood. But as a general point, some academies are better than others. Some have indeed artificially boosted their league table positions by pushing students towards easier GCSEs. Some are not as good as community schools. And yes, the DfE has an agenda to push.