It's also a red herring to compare an 80k ICE to an 80k Electric. (As you said in post 124)
For example, new BMW 5 series saloon, available in ICE, hybrid and full electric.
i5 eDrive40 from £74,105, min weight 2,205kgs, max tow 1,500kg
530e Hybrid from £59,455, min weight 2,080kgs, max tow 1,800kg
520i Petrol from £51,000, min weight 1,800kgs, max tow 2,000kg
Don't think they are going to be vastly different places to sit for all those miles of driving.
The 520i does 45.6-48.7mpg, depending on options, (44.5mpg would be 10 miles per litre, so easy for the maths) so on the lower of those would be £0.14 per mile, at £1.39 per litre.
The £23,105 difference to an i5 would pay for 165,000 miles worth of fuel. Even throwing £7,000 into servicing costs would still mean it would be over 100,000 miles before it got to the same cost of an i5 that was being charged for free. Which, of course, it wouldn't be.
So how long would it actually take to break even? You've obviously done your figures to work out that electric is correct choice for you. Can you share any obvious bits that would skew those in favour of electric?