Thanks for your help guys. 
 
I'll take a look at the parking brake - it was my first thought in case its been stood for too long and got a bit stuck.  I'll add some chocks to my shopping list. 
 
What's involved in the advance mechanism?  She's got an electronic ignition fitted by a previous owner, which should hopefully make a difference, but I've had *no* experience of ignition systems so that'll be something to learn.
		 
		
		
		
		
		
		
		
		
	
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