I'm with Kastar a bit here. Kinda on the high side but location and lack of tilers there can contribute.
Did you get 3 or so quotes? If so what were the price of the others? If not maybe get 2 more quotes mate.
Is the company that quoted you tilers only (as in they only do tiling)? And is it a VAT registered company (as that will add 20%) for them to get paid the same as somebody not VAT registered.
So there's a fair bit that goes into pricing and why you can get such swings from above average to below average.
A bit of a nice read. A few pages of replies. But good info.