To celebrate the opening of a new M&S Simply Food on National Burger Day (August 23), the Guardian Series is giving readers the chance to win £200 for the ultimate M&S BBQ Just in time for the August Bank Holiday.

For your chance to win, just answer the following question before 10am on Thursday:

What is the name of M&S Wanstead’s favourite burger?

a. Our Ultimate Burger

b. Our Mouth-watering Burger

c. Our Best Ever Burger

Email your answer and name to mandswanstead@grayling.com

Store manager Claire Benson says: “I’ve worked at M&S since 1993 and every summer without fail Brits get the BBQ out – with or without an umbrella in hand! M&S launched its Best Ever Burger Report this summer and found people in this part of the country champion a barby more than anywhere else, so we thought a BBQ product giveaway was the perfect way to celebrate our new store.

“Our opening is also on National Burger Day, so my team and I couldn’t resist putting one of our favourite new M&S products front and centre, Our Best Ever Burger – you have try it if you haven’t already.

“We hope lots of people from the area will enter our competition and can’t wait to welcome everyone into our store on Thursday – we’ll be announcing the winner on our M&S News Twitter feed on launch day, so keep your eyes peeled!”

Terms and Conditions: All answers must be received by 10am on Thursday (August 23) and one winner will be selected from all correct entries. The winner will be announced on the M&S News Twitter feed, as well as direct on email. They will receive an M&S e-Gift Card worth £200 to spend in store. The prize is not refundable and cannot be exchanged for a cash alternative.