Hello All thanks all again for the great advice given
Very pleased to say we have resolved the latest issue of slipped collar and vet visit and it went very well.
I gave Milo a diazepam to calm him an hour before we went to vets, got the slip lead on without him realizing, he was bit upset initially. He came into the car with me and sat on the back seat next to me having big cuddles and I was keeping him relaxed. When we arrived at the vets we called from the car park, the nice vet came out and took the lead off me and Milo went off without a murmur. No control pole needed or knocking him out
We waited in the waiting room and he was back five mins later very calm. Vet said he'd grumbled a bit but they got a muzzle on him whilst he had boosters and collars and a look over then they returned him with two collars and a slip lead on him, was very pleased to see us and had a big waggy tail. Got a referral to a behaviourist as well. The vet said he was in good condition.
Milo hopped back in car and wanted big cuddles and choc drops on the way home and is now tearing round the house with his squeaky ball and is quite happy.
What a palaver....
Pleased he is ok
Thanks for help all, will update on what benhaviourist says