Just for anyone interested in the figures of ECHP etc: www.compare-school-performance.service.gov.uk/school/140862/michaela-community-school/absence-and-pupil-population
You can use this tool to look up and compare any state school in England.
I do think the ECHP figure is unusually low, and I don't think you can just brush that off.
I do also think the school's results are impressive- as others have said, it'll be interesting to see if they can sustain that with a full school cohort now in place. I'd be interested if the model could be transferred to an area of the country where school funding is lower.
I suspect that at least some of the school's current success comes down to more teacher input, maybe slightly smaller classes and not being completely underfunded.
I do think there are probably some useful strategies that could be adopted though- the corridors thing is interesting, especially when a lot of older state schools can have very narrow school corridors that can be intimidating/dangerous.
I do think not offering Computing/Computer Science and the arts is problematic, though. Yes, you can do them at uni without studying them at GCSE and A-level, but many students will be reluctant to do so (especially girls in CompSci). Equally, I think the arts have lots of benefits for teens/young people and it's a shame if students get no/limited access to these at school.