Not wishing to divert the thread even further fr0m the original question, which I too pondered a week or two back...
My son works in automotive engineering, and says that the recent "100% electric only" announcement by BoJo and his merry men is at best a statement of hope, given the current state of the technology (which he fully accepts will improve beyond all recognition), the lack of infrastructure to support the charging points (i.e. massive upgrades needed to all electricity networks to carry the added domestic load (esp as most EVS will be charged overnight), and the need to generate all the extra electricity needed to power the charging points. He says none of the current bunch of MPs will be around to take responsibility if it doesn't happen, and even if they are they will simply say it's industry's fault (not enough charging points), power networks fault (for not having built in the extra capacity needed) or the consumers' fault (too few EV's purchased) for not hitting the target.
So, travel to airshows (and other major 'out of town' events such as sports, music etc as mentioned) is the least of our worries - it will require a step change in most people's lifestyles to accept a switch to 100% EV's, unless, and until, they can be near-fully recharged in five or ten mins (much as today's ICE-powered cars can be refilled with petrol or diesel), and until charging points are as widely available as current petrol stations, and/or everyone learns to carry a small 'emergency battery' to give another 20 -30 miles range to get the car to the nearest unoccupied charging point. Sales Reps, service engineers, holiday trips, day trips to families or to places of interest will all become much more dependent on the (currently poor and poorly integrated) network of public transport. Add in winter usage of EVs where heating, lights and wipers etc will all drain EV batteries far faster than a summer trip over the same route/distance, and things look even worse.
We'll be heading back to the days when most people rarely travel very far beyond their local area in their own private vehicle, as their modern day 'electric carriage' will be much like the limited range of the old horse-drawn carriages, max journey radius being half the total distance the horse (battery pack)can manage - unless there is a mindset to develop a 'common' and easily changed battery pack format across multiple EV brands, so that dead batteries are simply swapped for recharged packs as necessary mid-journey. And given EV battery packs weight 500Kg or more, it is not as simple as a few seconds spent swapping a couple of dead AA cells in your torch.
The days of travelling for hundreds of miles there and back in the comfort of your own vehicle to see the footie, visit your folks, see an airshow, or see your favourite band will be distant memories - unless you are one of the few who can afford a Tesla. Or unless we have all paid the extra taxes needed to subsidise the mass upgrade of electricity supply network and mass installation of charger points.
Imagine how much power a large event carpark full of recharging EVs will draw - no need to worry about global warming due to CO2 emissions from ICEs, the cables carrying the power to the EV carpark will warm the planet anyway!