This is also available in Tesco - although at £3 for a 440ml can I'll stick to drinking it in the pub.Enjoyed a couple of pints of Cooler Shaker - an "IPA milkshake" from Hebden Bridge's Vocation Brewery in the legendary Scarbrough Taps this afternoon.
Their website describes it as
Shake things up with this creamy IPA, brewed with lactose for a full-bodied and milky texture. Passionfruit and Mamey Sapote balance the sweetness of the lactose and give this brew an exotic finish
I got one to try given the description and it was so nice I had to have another.
It really is rather good.