Anyone know where I can buy it? Either online or in a uk shop?

St Helier cider adds Blueberry variant

There are contact details at the bottom I'm sure they would be more than helpful.

http://www.stheliercider.com/Page/Index.aspx

http://www.stheliercider.com/Page/Stockists.aspx

Available online from Buy Drinks, Beer, Whisky, Wine & Gift Packs | Hi Spirits

Netto!! Its like £1.50 normally but they've always got it on offer for £1!! They do a smaller version sometimes too. All the flavours aren't always in but they've got peach(pear), raspberry & lime(pear), pear, bluberry and others I'm sure I've not seen :) happy cider days!