Its been removed before tapping it up with a block of wood and a mallet, but doesnt seem to be doing the trick this time?
Cables are detached and grips loosened right up, wd40'd it as much as possible..

Any further tips?

Wedge a piece of wood in between the rear of the carb and engine and lever it off. Should pop off easy with good leverage.

First time I've known anyone to have trouble getting the carbs OFF!

I must be an ultimate spanner, the wood worked a treat thanks again!