Thanks for your welcome,
A little more about Casper.
We got him last October from our local RSPCA centre - they recommended that we did not pair him with any one as they had had problems. We were expecting to keep him outside in a hutch but we kept bringing him in until it was going to become cruel to keep putting him out into the cold after being inside so long. He now has a cage indoors and has the run of the house during the day (although he is frightened of the stairs).
He is slowly becoming more confident and now jumps onto the sofa to get a stroke. He does wonderful 'binkies' around the house and when he is really happy he picks up a pice of paper and charges around with it in his mouth!