Finally managed to speak with the Vet.
He said that I have done more than he would think of doing and that if I felt I needed him to come out all he would do now is PTS.
As a codicile he added 'and that would cost you £100 + Drugs + VAT...................
He would not attempt to tube Jake to deflate his stomach and he would not attempt any surgical intervention.
I am to call him back if/when I want my Rabbit Euthanised