Funny how the second anyone gets rid of an Omega, there's very little to actually do to a car 
Whilst new fangled cars on company lease plans are great in principle, I do wonder where the catch is 
I mean zero deposit and low payments on a £70k+ car has to have an almighty gotcha attached to it? Retail leases are circa £2k down and £1,700 a month and you still don't own it.
If your employer are picking up the bill then there's a massive implied benefit, likewise for charging at work.
I hope the car serves you well, and getting shiny things is always fun, I hope you've done your homework.
I don't charge at work, only at home, for £0.07p for each kWH. I'm on a standard Octopus home charge policy, that always gives that price no matter the time of day. (for the car) - It just dynamically wacks charge in when demand is low. I just ask it to ensure it's at 80% each morning at 07:00.
I can assure you I've researched this to death for the past year, as for me it has a bigger impact on my pension and I needed to calculate the impact there.
There are wider implications for me around the 60% tax trap and trying to ensure that I never pay that tax threshold. Be it via pension contributions, EV car, childcare vouchers, denplan, etc.
I'm confident in the cost and also wish I jumped on the scheme earlier than invest in the 435i 3 years ago. Given what I know now and how much it will cost. It is rather ironic that the more you earn the cheaper the car is, because the more tax you save.
For me now, it's a simple no brainer for £450/m loss in my take home, with zero down and a brand new 600bhp car that's pennies to charge. Even with the pay by mile scheme, if/when that comes in it's still going to be cost effective for an EV for me.
I suit EV ownership as my daily milage is 60-80 miles max. But I do that at least 3 to 4 times a week. Plus maybe 20 miles at the weekend.
If I was asked to travel to 300+ on a weekly basis, on a single trip eg go to Manchester, go to Newport, go to Ipswich each week I would not be so keen. The cost charging away from home greatly reduces the benefit.