Cracked me bloody screen didn't I. Popped into Tesco (24 hour one) to see if they had a screen protector and they did... reduced from £5 to £2, and it scanned through @ £1!
(There is another version which is £12 which wasn't on sale)
Seems good. No air bubbles, and comes with alcohol wipe and cloth. Oh and there's two in a pack in case you muck it up 8)
PS: Tortoise is the brand, you cannot protect your pet tortoise with this product.