Go to amazon.co.uk and type in leather case for ipad2 there is one for £10.50 at the moment that is in my opinion better than the Aplle one.
It has a magnetic screen cover that activates the sleep function.
It is for the iPad2 which is slightly different size to the original iPad
I am using it at the moment.
Read the reviews.
The apple covers are rubbish. I've got a Snugg one which is leather and gives good protection. The Mrs has a plastic Belkin one which is all shiny gloss black and hi-tech. Both about £15
I can't copy the header but the description is as follows on amazon
Accessories Online - iPad 2 Premium Leather Case Cover and Flip Stand Wallet for Apple iPad 2 - Black * Fits all Models * - Case With Magnetic Sleep / Wake Sensor Feature - Includes 2 Screen Protectors
Dont waste your time fitting the screen protectors they are not good quality but the case definitely is at the price. I paid double as the price changes a lot on Amazon depending on stock I think.