Welcome aboard Andy its very common on Westwood's for the solinoid to pack up on them if they have been standing a while also check the ignition switch they canbe a problem its unlikely to be the starter motor
got it back on the bench yesterday, and had a couple of hours on it today, got the regulator box fitted, breather fitted and made a lift up seat base with suspension for ians big backside
looking great paul you need to pull it outside for a full photo shoot now to realy show it off, cos you would be hard pushed to
find a better one but what you realy need is another one in oily rag condition to put next to it at the shows, it just
so happens ....