Arnold Clark leasing - tyres

[Monkeez]

Hi all, i've got a lease going back in a couple of months and I need a new tyre.
I've looked through my paperwork and there is no mention of what brand the tyres have to be - just that they have to meet the manufacturers spec and be a minimum of 1.6mm tread left.

I was going to get a budget tyre with the same size and rating as what is on the car at the moment.

Has anybody on here dealt with AC leasing regarding returning a lease and replacing tyres?

Cheers