Have a contingency plan and put a strategy in place with what you have said in mind.
Maybe look to put your kid into a primary school maybe in an area outside of your local area as an option.
The Slough Sikh Community is moving into South Bucks area. Like we mentioned before, there is a typically a 30 year cycle where a Sikh stronghold starts to change.
The Grammar School system in Slough has become increasingly competitive and like you mentioned with those South Indian IT types in Langley will begin to hog up those grammar school places.