The answer

They don’t pick the clippings up! Just mulch it into tiny pieces. I would love to see one tackling longer grass.😁

About 3 years ago they were trialled where we lived ( I put a photo on a thread here). I believe our council decided not to go ahead due to unreliability 

the problem on the site would be all the money they would have to spend to get rid off all the ehu cabling 

Really? The site I presently manage for the CAMC has 20 acres of land. We would need quite a few ! As they just mulch, can you imagine the grass carried in to the toilet blocks, walked into caravans and motorhomes.

I wonder what the next big idea will be, perhaps laser guided tractors, so we get the lines exact?

Can you imagine running overhead cables from the bollards to the vans

Lasers and GPS are already widespread in controlling tractors etc to ensure no bits of the field get missed, and all get an appropriate dose worked out by the computer from aerial photographs.  So no problem there in knowing where the grass ends and the hard standing begins.

Hopefull in the great site rewiring that is coming to support charging of electric vehicles the Caravan Club will go the little bit extra and set a bollard to every pitch.  And while they are about it and have already got trenches dug, they could put a water tap on each pitch as well.

"they could put a water tap on each pitch as well."

easy to do at the time and a nice little earner, having all pitches effectively (semi) Serviced Pitches.

without the waste water drain the club could charge perhaps 'only' an extra £2.50 a night? 

that would be £35 extra for a fortnights stay when the MH's water tank can currently be filled once, for free, and lasts that two weeks?

.....hmmmmm

The whole point of these robot mowers is that they can be used frequently so the grass never grows long. My son uses a robot vacuum cleaner in his flat programmed from his phone.

The future is arriving now. I'm sure they will be used at places like the National Trust properties in the near future.

the MH's water tank can currently be filled once, for free, and lasts that two weeks?

A 1200 litre tank must take up a lot of space!

But then some sites that do not have anywhere to dispose of grass cuttings already use mulching decks on the tractors

who needs 1200 ltrs over two weeks?

you might (although I didn't realise your van had a bath) we certainly don't....

are you really using 85+ ltrs a day....?

if using the site showers, 10 ltrs a day seems to do us, and that includes washing up in the van....(it's nearer 20 ltr a day if using the van shower)..

as we wash up, make plenty of tea/coffee, clean teeth, flush loo and wash hands (don't generally use site loos) I wonder where 8-9 times the volume of water goes in a caravan....

i knew they leaked but that's ridiculous