There has been a number of factors recently that has seen prices tumble.
Like Tesla reducing the screen price of their model 3 versions by 6 - 10 grand has been a major factor in the recent residual prices.
To name just one.
I think it works similar to other companies, prices are linked to current stock levels that WBAC / Motorway / Carzoo are holding.
If their availably / stock level for that model is high, then the offer price is low and vice versa.
A reflection of the supply and demand in the market.
Crazy to think, that only 6 - 9 months ago the market was paying new car prices on a second hand EV.
If you cashed in then, you are quids in.
Not so at this present time unfortunately ?.