Instructions:Type code R7THJ9XS into the box to get 10% off. You'll need to go almost all the way to the payment stage to see the box at the bottom left of the screen. THIS STILL WORKS.
could not get the voucher to work, but as of 7/5 if you sign up to their news letter you can get 10%off says will email code but gives AJ557P, tried with another mail address and gave same code, says in tand c expires march 11 but is live still on their wed site,
hope it helps those who could not get 1st code to work