Suffolk vehicle battery not charging

Good afternoon everyone.  I hope you can advise.  I don't really understand much about the electrical stuff, so please be kind.
Autosleeper Suffolk, 2011.  For various reasons the van has only been out once this season .    It is plugged into home electric system, and power is getting to vehicle.  The EHU is switched on about 2 days a week to keep batteries topped up,  but I think someone has unplugged it without me noticing.
The vehicle battery is flat, and I guess it is dead.  The leisure battery seems fine.
When I press the battery button on the control panel by the van door, it beeps twice but doesn't switch on for either leisure battery or vehicle battery..   I don't know whether this is just because the vehicle battery is flat, or if there is a problem with the charging system.   I'm guessing I need a new battery, but would this fix the problem?
I'll add photos of the control panels, if I can work o[url=https://servimg.com/view/19975154/11][/url]ut how to do that.

hi
duplicate pics because I was having trouble uploading, then unable to remove duplicates!

Lesuire battery shows on charge. Vehicle battery at 1.5v, EC325 won't switch at that voltage. Try a separate  smart charge direct on the VB.

To remove duplicates click on Edit (top right), then click on picture and then delete on keyboard.

Have you got breakdown cover at home? Get them to jump start van.

Morning 
Had the AA out yesterday and he jump started the van . I’ve always found them very helpful and pleasant. Battery looking poor, but now on a smart charger, so will see what happens. ( not a lot so far!). Fingers crossed.

Take the battery off and take to Halfords or garage for a load test..think a new battery is needed..my 6 month old battery was reading 13.7 but when I switched the pump on all the lights pump etc stopped working.  The draw from the pump was too much.  I got an auto elec to check various things and the end result was a dead battery, because it was only 6 months old I had ruled it out. Reading 13.7 because it was topped up by the solar and alternator when driving so testing across the terminal’s it read ok, it’s battery health was 1%..dead..hope this helps.