Thanks everyone for the replies, it has certainly given me some food for thought.

I suppose cause I was so "lonely" at school from a family perspective - no siblings, cousins or family friends/neighbours, that I really dont want that for my kids and I was/am concerned that that would happen if they went single sex...but by all accounts it wouldnt matter where they went it sounds like siblings dont really "hang" with each other anyway!!!

My DH had already said that anyway (he is the eldest of 3) but of course I had to get another opinion as well!

Its still quite a few years away anyway but it has been playing on my mind, especially since the kids have all been enrolled almost from birth - ridiculous really!