Hi,
The batteries in Cypress are just 2 years old, the engine starts well normally, but it's not a 'quick turn of the key' starter, it'a vintage job! and needs some respect, It's dead easy to flatten the battery by just turning it over without any thought and cables do become hot under these circumstances.
I would not let anybody have a go a starting it without some thought and instruction. That engine needs careful use of the de-compression lever, easy starting on that engine is achieved by using the lever to decompress the engine, turning it over a few times with the starting handle, then turn it over on the starter motor getting revs up, then throw the decompression lever and away she goes.
Sometimes, with that engine a blast from a blow torch helps, it's a good engine that one, but takes a knack to start it, it sounds as though the 'numpties' trying to start it have not got the experience and just keeping a digit on the starter button will not get it going, doing that will just flatten batteries and heat up cables.
The charging system was modified to overcome problems a few years ago, it now has 2 alternators and a Battery management system, and the engine had new pistons and a through overhaul at Watford some years ago.
Letting anybody loose on a vintage engine, even down to trying to start it is not recommended.
It's a difficult times for engines and batteries, my 2LW started perfectly, after lockdown, but the batteries needed renewal.
Hope this helps.
Mike