Awful flavour, but a bargain, Also have quite a bit of SIS stuff if you search
https://www.hotukdeals.com/deals/sis-sis-go-isotonic-energy-gel-30-pack-cola-at-blacks-3623995
These too
https://www.blacks.co.uk/15898041/sis-rego-protein-bar-20-pack-peanut-and-chocolate-15898041
https://www.hotukdeals.com/deals/sis-sis-go-isotonic-energy-gel-30-pack-cola-at-blacks-3623995
These too
https://www.blacks.co.uk/15898041/sis-rego-protein-bar-20-pack-peanut-and-chocolate-15898041