I have to burst your bubble, but Law as an A-level isn't necessarily going to help you at university. You often cover the content within the first few weeks at a university degree. Some universities actually don't like it because it doesn't make you look as broad in terms of education. I want to be a lawyer too, hence why I researched so much into it, and the fact it's considered a "soft subject" ( I personally disagree) is the reason why the grammar school won't offer it. So please don't base your decision on the Law A-level, it's not all it's cracked up to be. Personally, I went from a mixed school to a grammar and although it was daunting at first it was one of the best decisions of my life, the competition can be intimidating, I totally understand, but it pushes us all to be better. The fact that you can get a private-school level education for free is a great opportunity, and regardless of how successful you were in getting in, you still did, they wouldn't have offered you a place if they thought you weren't capable. It's a brilliant opportunity, and although it's daunting, friends come and go, you'll easily make new ones and it's unlikely that the ones you have now will be with you for the rest of your life anyway. Just think it through, I had the same dilemma, and although it's more of an effort, I think it pays off, and it will definitely leave you in a better position in the future if you go to the grammar (It should't, but it's just the way it works)