200 miles over 2 days, that's a long time on the road, especially around London.
What was the fuel level before and after?
Does the trip or mpg meter(s) show anything to support this?
My point being in the early days of ICE, finding petrol stations might have been equally challenging.. It didn't stop what we all accept as normal now?
But we don't all have to have BEV, just we won't be able to buy a new non-BEV. We can still buy and drive 5ltre supercharged petrol engined cars if we so wish..