Just back from Sainsburys, they had all varieties of J20 reduced from £3.48 to £2 per pack of 4. There was
Apple & Raspberry
Apple & Blueberry
Apple & Melon
Orange & Passionfruit
Apple & Mango
There may be more but that's all I could remember!
I know they are £5.99 for 12 @ Lidl but even though it's 1p more for 12 you can pick and choose what flavours you want so much better variety plus you don't have to get 12 - you can buy a pack of just 4 if you want. Online too but less variety.