It might depend on how you pay yourself via the Limited Company. If your salary is low, for whatever reason, then the business leasing the car (rather than you) might be beneficial....
1. You reduce the profit of the business so will pay less corporation tax at year end.
2. The BIK tax on an EV...
I was going to ask something similar...
I was looking at this a bit - not that I can afford one, but thinking ahead to when our old Honda Civic gives up - and the leasing pricing looks strange.
As you say the Y seems to be far cheaper to lease than the 3, although the purchase price of the Y...