YAY! good choice! If you need any ideas for interactive Games to play with him, and ways to get him using his tree, I have lots!

I would keep the situation under review personally. Keeping him in is fine if he continues to be happy but less so if he becomes cheesed off and constantly trying to escape out of the door.

Good choice play games with him get him interactive toys and he'll be much better off than outside.

I will keep an eye on it, I will think about cat proofing the garden in the spring or getting him an outdoor play pen or something silmilar. Some suggestions would be brilliant if you don't mind? X

You can get outdoor pens for them you might have to google it. Mine is declawed (not by choice was when we rescued him) so we didn't need to secure the garden or anything

I think if you deem your neighbourhood quiet enough for him to be relatively safe, and as he's used to accessing the outdoors, then seeing as you've kept him in for 4 weeks he knows that home is home and if he's neutered it should be fine for you to let him out. It may be quieter round yours at night, our mittens like to go out for a prowl in the evening and I call them in frequently just so I know they haven't vanished! I don't have a cat flap, they miaow at the windows if they want letting in.

You could even to avoid the risk of your cat being killed lead train him if he'll accept it and take him for walks. It get him outside but he's safe