Hi Max, it's a small world ain't it R293 OFJ, sounds like our old one.
The leisure battery is about 5-6 years old, so it may be on it's last legs.
Under the seat with the battery electric's i installed a change over relay to charge the vehicle battery when it was stood over the winter time as the alarm would drain it and I had a solar panel on the roof which was removed and fitted to my new van.
Yes we did look after it the wife's pride and joy she was sad to see it go, but nice to know it's gone to a good home.
Got afew extra's that we still have,shower mat, wheelclamp,etc.or if he just want to know anything about the van pm me and i'll drop you my contact details
Nigel