Maybe it's you who's lying. An EV will have a considerable price premium over the equivalent EV, plus the EV will suffer greater depreciation. You haven't factored these costs into your claim. The savings on fuelling an EV would be much less impressive if you did.
For eg. a new petrol Corsa can be had for approx £18K, however the cheapest EV version is almost £10,000 more. Honest comparisons needs this huge price differential pricing in, plus high EV depreciation.
£10,000 buys you a lot of petrol.
Depends if you want to compare "same" with "equivalent".
I have a Kia EV6 GT-line. Got every driver aid I would ever need - radar cruise control, lane follow, that sort of thing.
£51k list. AFAIK, they don't make an ISE "same".
You could probably get all of that on a £35k Peugeot: similarly, you could probably spend £50k on a Jag or LR, and not.
As for depreciation being much worse on an EV, that really is a myth, unless you want to crowbar in a specific "to suit your point" timeframe.
Realistically - climate change excepted - you staying in your ICE will continue to make my driving much, much cheaper.
But, like I said, you stay in your lane, and I'll stay in mine