For the ultimate test in resisting temptation, head to Ed's Easy Diner this December and you could find yourself £5,000 richer come January 2012.

Every guest of Ed's in December will receive a mystery envelope, which could contain a whopping £5,000 prize. Ed's is also giving away thousands of £20 vouchers and discounts - everyone's a winner! The catch is that it MUST remain sealed until a return visit in January when an Ed's manager will open it for you to see if you have won! Any damaged or defaced envelopes will be invalid and the prize forfeited - so handle with care!

Head to Ed's and who knows, you could be £5,000 richer in 2012 - just bring your UNOPENED envelope back to an Ed's Easy Diner by 31 January 2012!