It's a sensible idea and one that would be welcomed by the UK government:Hiring is getting tougher all the time. Probably given time, giving employees free charging at work will become another carrot.
@NSP is the car park for a business or an apartment complex. Here a lot of the big office blocks have had companies come in and supply the hardware and supply etc and it’s pay by account or card. I’m pretty sure the landlord gets something for that too..
A taxable perk, I should imagine it would, at best, negate the perk and may actually cost more than you saved.
Once petrol has been lost as a reliable source of tax revenue the next registered asset to take up the slack will be the EV.