Ribena have released their new sparkling Ribena and Mitchell's and Butlers are running a promotion where you can register via the link and get a 16 digit code/voucher emailed to you. This entitles the bearer to one free sparkling Ribena.
Just tried the blackcurrant and cranberry and it's very nice.
please note your voucher is only valid in Toby Carvery, Harvester, Crown Carveries, Stonehouse, Ember Inns, Sizzling Pubs, and OakTree Pubs. Voucher can take up to 24 hours to be received although mine was pretty much instant