Two Tyres are local to me , 15 mins away and being in the tyre game myself I can tell you they're making bugger after VAT , postage etc.
It amazes me how they do it ..
That being said, it's good for riders bagging a cheap set of tyres however, getting them fitted is another matter.
If you're will to go through the hassle of getting your tyres to a fitter who in some cases will charge at least £30 per wheel, in the long run, the extra time and cost often can nearly equate to buying them from and having them fitted by a reputable tyre supplier...

When someone brings me their own tyres I always ask if they'd mind telling me how much they paid for them so I can compare.
In most cases the difference is very little.