aaah well i persevered with the wriggling to no avail so i resorted to a little more persuasion, pliers to bend the choke lever aiding release of the link.
i also realised you have to totally drop the frame to allow the carb to clear it..
so far so good smile
today i'll get carb cleaner and some suitable wire to clean the jets...

sadly i have just moved house (to a house with a lawn) and threw out masses of my 'useful' stuff from my previous garage after much derision from friends for collecting 'rubbish'... lol which i knew would be 'handy' one day, like bits of wire, i am now working hard to replace those valuable resources smile