All Shirts are for sale at £25.00 Each at the now month old store at London Bridge Rail Station as a new shop opening offer. (Its actually located between the Tube and the main station before you go up the escalators)
Normal prices range from £37.50 - £79.00 though not sure this store carriers all the styles.
There is an offer for 4 shirts for £90.00 so it would be cheaper to buy for if you are in the market for 4 new shirts, if you only need one or two and live or work around London Bridge then you can save some money.
Not sure when the offer expires.