To an extent, yes, I was scared into putting him back although in some ways it was right to try to get him back with his mother and the rest of the flock. (As it turns out both she and they ignored him, so he was actually no better off and as things went, worse off) If I'd kept him I was under the impression from posts on here that I had to get a CPH and movement licence, tag him etc etc and for my property to be checked over. I couldn't have that as at the present moment my chicken run and shed are a mess of mud with all the rain and am waiting for my son to have time to help me clean it all out and lay gravel. If he had stayed a bit longer he would have been stronger and been better able to resist the coccidiosis that killed him. He could have learnt about outside things too as my back garden is safe for animals(and small children) and he was in the conservatory which leads out to grass.
Rules are rules, I understand that, and basically I more or less live by them, but I wonder what the harm is in allowing a little leeway. I am a little disappointed, and I would do the same thing again - what I wouldn't do is be so naive as to put it on here.
I think I will probably lock this topic now if I can. Thank you very, very much to those of you who supported me.