I have just been to TESCO (the Litherland, Liverpool one) and found these brilliant mirrored protective screens for my phone.
I have been after a decent one for ages but the decent mirrored ones are normally around £7 each!!!
I got 3 in a pack (with anti static cloth) for the princely sum of £5.97.
MOD EDIT: Swearig fest removed (andywedge)