I read up on sunburn and was not to worried about it until I move them outside, now I look at my golden barrel he has turned slightly lighter green on one side (wasn't sure sunburn was possible in the UK
). I will keep them in my north west window, its bright all day with the sun coming round for an hour or 2 ( which i didn't think was enough for them). I've made them a little 2x2 green house for the summer, I will be cautions about where I put them then and introduce them slowly. Id rather learn this now then in full south facing summer sun. Thank you so much for your response.