I wouldn't suggest going to Claremont for sixth form - they're pretty average and the facilities are rubbish and they treat you like a child rather than an adult (I went there so I'm privy to that information). They're good for GCSEs, but they know they're rubbish for A-level so they try to get the smart people to stay by offering stuff and having meetings with them however they know the students will leave anyway to go anywhere but there. I'm currently in St Dominic's and I love it there - you'll fit right in. Even though it's Catholic, the religion isn't that strictly imposed on everyone (we do morning prayer for every period 1 lesson but most teachers usually forget, and there's Friday mass which is optional, and RS but it's more based on society rather than religion).