@CPF I don't have a child in any of these schools...yet... because my son is in Y6. We are on the waiting list for one of the schools below. But , we may stick to our offer from another school that is equally good or better and not listed here. If we get offer from one of the below it will be tough choice.
However, I can tell you my observations. Maybe these will be helpful, or not.
Orleans Park - The positive thing is that the bus stop is just at their doorstep. It has wonderful results. The computing rooms are splendid. The atmosphere there is very much like at the university. It can be a positive or a negative thing. Children seem to be anonymous, teachers pass by without any interaction just like at uni. I just didn't get that personal, caring vibe. It is great, though, for the Sixth form and may be overwhelming for Year 7.
The area where kids can hang out outdoors is rather small, where the benches are, as nobody can go to the sports field apart from during the lesson. I also didn't like the fact that there are outside buildings with separate access from outside to each room. In the winter, it may be cold there, and the lack of a corridor doesn't help integration. They have a great offer for languages should you wish to pursue it. If a child is into humanities, and languages that would be the best option in the borough. They are also great at maths though.
SRR made a better impression on me. The school has that personal vibe and care. The building is squeaking clean and very well decorated with the children's art and projects. They seem to be very organised. The extracurricular offer is amazing and very holistic. Everybody will find something there.
Unfortunately, the sports grounds are limited, and they use the sports field at another school. It may not be ideal if one has a sporty child Also, there is a primary school section in the school. They were not visible during the Open Day and were well hidden, but I am sure that they run freely around every day. The school may be crowded. The Open day was neatly prepared. The teachers stay in that school for a long time, so it must be a good environment. However, there is a thread here from the past in which one mum complained about the bullying and swearing. The school is very close to the high street Twickenham, and kids tend to hang out there after school, which I don't like.
I cannot say anything about Grey Court as I have never been there, nor do I know anybody from there.
Turing school is very disciplined and is spot on choice if somebody focuses on maths, or computing. The kids are very well-behaved. I think this school observes less bullying but I cannot be sure. They have a very charismatic headmaster who invests heavily in practical novel solutions. Because of the proximity to Waldegrave, there are a bit more boys than girls at Turing. The school is located at the verge of Richmond borough, and kids tend to hang out in the Hounslow area after school. Not the safest area. The school is very new, so the building is a bit "blocky" and overwhelming and they still raise money for wall decorations. They have a fantastic canteen with great food.