Thanks for the advice. Have him home today, so keeping him in a crate, in the kitchen as it's just thru the utility room and out the back door. He's dandering in and out of the crate, haven't even had to try and lure him in, with treats. He a wise boy, as his vet blanket and a few toys are in there.
Intend, hopefully, to toilet train him straight to the back garden. Have been taking him out, every hour and after drink / food, which has had 4 pees and a pooh, all in the garden. I'm lucky, to have a big garden, so easy to sit out with him and enjoy the half decent weather.
As regards socialisation, he's about 15 weeks, so has been very used to other dogs, both adults and pups. I'm more worried about him missing them but will work at keeping him socialised with other dogs and of course humans
Live in a bungalow, so don't need to worry about the stairs and he's also going to get "introduced" to other parts of the house over time. Sensible advice regarding the exercise, etc., so thanks for that.
Lastly, a quick mobile pic, of our newest family member - Lightning

IMG_1240[1] by
johnnypanic on Talk Photography