I'm really sorry to read your update [emoji17] I agree with Zoobec: you can only make decisions based on how he seems at any given time. In all honesty, if I'd been in your position I wouldn't have taken him all the way to Camden as he'd been showing positive signs of improvement. You had no way of knowing he'd take a turn for the worst and you can't preempt something if you don't know it's going to happen.
I think you're right to stop the syringe feeds for now given his belly is distended. Not sure what to suggest about the vet. I've attached the link for the Beaumont emergency service. Unfortunately their OOH service is all the way over in Belsize park but there is a contact number at the bottom of the page. Someone might be able to advise on whether you'll need to take him to the OOH vet or whether you can wait until you can see your trusted vet in the morning.
https://www.rvc.ac.uk/small-animal-vet/general-practice/practice-services/emergency-vet
I'm really hoping he can turn the corner. Sunday night really is the worst time for this to happen [emoji17]
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