Thank you everyone for your kind words and support. I am overwhelmed with the kindness of complete strangers, it really restores my faith in humanity!
As a family we have decided it's best for him to go while he still has some quality of life and we think that early next week is the best option.
We are trying to organise a vet to come out to our house for us. It's going to be heartbreaking and I can't imagine life without him... he was my 5th birthday present, so I hardly remember a time in life without him but it's the kindest thing for him.
And another picture of my lovely old man.