nah would ya fuck, turn the tap to the off position (if its vac operated then dont bother, the fuel line wont be open unless the engine is trying to draw fuel), and disconnect the fuel feed pipe from the tap to the carb, if it weeps a little bit just stick something up the end of the pipe.
tanks off, seat will be a couple of bolts, cheers easy (Y), if you fancy a trip to the 'shire im here for the next 2 weeks with my thumb up my ass, bring it over