I know a few people on here use Tyre Leader, myself included, but a friend is currently having an awful experience with them and their customer service department which I thought I'd share.
He ordered a set of tyres from them on 11th October, there was an attempted delivery by DPD, for which he then tried to arrange a collection from their warehouse. He rang to arrange this, when they then told him, they are returning the tyres to Tyre Leader as per their policy.
The tyres arrived at Tyre Leader on 22nd October, to which they do not accept despite tracking information showing this, and confirmation from DPD.
Tyre Leader are still yet to send out the tyres they received back from DPD, nor have they even set out replacement tyres in the mean time.