I didn't realise that you could go and visit the school at anytime (with an appt of course!) and will certainly look into that. Our son is only in year 5 at the moment so it is not something that is too urgent just now but something for us to mull over in the next year or so.
Any comments I can get are all a bonus towards helping us make what will be a very difficult decision. As you can read from some of the replies everyone has something good and bad to say about all three schools.