As sibling comment posted, if you run a company you can write off the cost of the lease against corporation tax (25% tax saving), VAT (a further 10% saving if you have personal use, otherwise the full 20% if it's purely business), and you don't have to pay income tax on the money (albeit with a small benefit in kind payment).

If you're in the higher tax brackets this means a £200/month lease (say) ends up more like £90/month.

And because of the "new" £3kish subsidy the govt put in, the car finance companies seem to basically apply that as a big discount to the lease value (or it seems that way?). So you could get a brand new ~£30k EV with no upfront payment and a 2-3 year term for <£100/month including maintenance. Mine even came with a free car charger install at home.

This only works for business leases. The employee sacrifices part of their salary in return for being provided a lease car, and both the employee and employer save tax on that money (up to 45% employee, ~15% employer).

For an ICE car the government claws this money back through hefty "Benefit In Kind" taxes placed on employer-provided vehicles, but as an incentive to drive adoption the rates on EVs are only 3% of the car's nominal purchase price (and you only actually pay up to 45% of that 3%).

It doesn't work out "free," but it's typically as cheap to lease a new EV through this scheme as it is to pay the depreciation on a used ICE.