I think you need to print the entire email which will have your name and email address.
is this a unique voucher? this is what I got when I try to download
Used this today. And you can use it as many times as you like up til the expiry date
"Now print or show your server this voucher to redeem your £10 off!" Seems like you can just show it on mobile.
do you have to print the voucher or can you show it on the mobile thanks