Hi Phil,
welcome to TM!
Also, wearing my "other hat" as Vice Chair of MSCC, yes, please do join, you will be very welcome indeed. A quick trip to the
MSCC Web Site should sort you out!
To the battery issues: if it is a recent-ish car then about 3 weeks without using the car = flat battery. So a trickle charger is the way to go. But as has been said, the best solution is to go out and enjoy the car. Modern Mogs don't rot and whilst a bit more TLC is needed than with a modern "econobox" I view my Mog as a year round drive. Yes, a bit of wrapping up warm is needed, but the experience is worth it.