Thanks guys. Feel a bit like crying myself, but also quite nervous. The dog warden service normally don't do direct homing and they stressed on me that it's at our risk, as normally a dog is transferred to a rehoming centre and properly assessed before being offered up for adoption.
We've had a trip to Pets at Home and Aldi this morning to buy an extra large crate, harness and dog bed, as we we won't have much time for shopping this weekend. Moonlight Shadow AGM is tomorrow and on Sunday youngest son Alec is arriving back from the US.
We are thinking maybe Tamaskan or Northern Inuit Dog, or he might just be a mut - a German Shepherd/Husky cross. The Dog Warden service listed him first as a 'Wolf Dog' (both Tamaskans and Northern Inuit's are descibed as that) but they later changed it to Husky X.