Hi Hawkwind a couple of the clips are very rusty and one I damaged trying to pull the rubbers off. I was rushing to try and find the leak from no.2 carb so I could get the old girl out and go for a play. Not sure where the leak is from though and have had new rubbers and float bowl seals delivered today. People have also mentioned "T piece" O rings. I'm guessing these are the links between the carbs...

 

OK John, yeah I think the 'T' O rings are the ones you mention, though I've never had to do them myself.

 

Correct they are the Fuel T pipes that link each set of carb's with an oring (2) on each
side of the T. They shrink and leak.