£190 is a great price, 1-PD who did you get to do them
As a a general rule about £50-60 a corner, expect and extra £10 per vat for tyres to be removed and refitted.
Prices are on the up lately, I had a set done for £150 but that was 5 years ago
Lepsons who come highly recommend are about £300 for a set (size and type dependant)