Just had two new Pilot Sport 4 S tyres (225/35/19 88Y XL) fitted to my Golf today and got them for £134.63 each (fitted inc. valve, balance & VAT, etc.) from ATS Euromaster (ordered online).
That's £11.77 per tyre cheaper than I paid for two from Blackcircles in April.
Cheapest I could find by some margin.