Tried it and it says for new customers only :(
Thanks for posting heat from me (y)
Majestic deals never get the heat they deserve. However, this code is only for 10 off 50 and is for new customers only. If you are a new customer you would be better off using CP716XHY1E which gives 20 off 60. For existing customers you can get 10 off 40 via Wuntu.
Heat added cheers (y)
Probably because they're the types who prefer sub £5 slosh and think Jacobs Creek is 'well nice'