Not saying new EVs aren’t pricey, but if you want into electric on a budget (i.e. because you don’t feel like you can afford to fill up on diesel) it can absolutely be done.
Also, my god, £22k for a petrol base Polo! That's about £4k above inflation-adjusted prices from ~15 years ago
These are all models under £20,000 - https://ev-database.org/uk/#group=vehicle-group&av-1=1&av-23...
There's also a large number of used EVs available. Here's a selection of 2024+ models between £8000-£10000
https://www.autotrader.co.uk/car-search?channel=cars&fuel-ty...
Diesel was traditionally the fuel of people who did high miles. Ie not the people that can't have an EV 'just in case they need to do 300 miles on a day's, because they probably legitimately are.
You kind of spoil that point by pull £80k out of your arse without looking at comparable diesels though.