In UK law and most other countries, a copyright statement is not formally required, but if you use one (and you should) a valid copyright statement comprises 3 essential elements

• © - the international copyright symbol
• Your name - the copyright holder's name
• Year - the date of first publication

So © John Doe 2008 is correct. You may add other information as well, such as 'All Rights Reserved', a telephone number, address, website address and so on. EG © John Doe 2008 All Rights Reserved - www.johndoephotos.co.uk