Well the first trip up to the patch was ok, it started easily enough, but after it ran out of petrol (had been running about 25 or 30 mins) it would'nt start again, so I packed up for the day. Will try again this weekend.
As luck would have it, they had 800w generators in B&Q for £60, so i've bought one of those too. Good for leccy strimmer, etc . Haven't tried that yet though/