I do a fair bit of hiking and tined food comes in very handy so I keep an eye on tined goods sales, heres' a few from Tesco:

Heinz Chopped Tomatoes in Tomato Juice (4x400g) in Tesco | mySupermarket
Napolina Chopped Tomatoes in Tomato Juice (4x400g) in Tesco | mySupermarket
Napolina Peeled Plum Tomatoes in Tomato Juice (4x400g) in Tesco | mySupermarket
John West Tuna Chunks in Brine (4x185g) in Tesco | mySupermarket
John West Tuna Chunks in Sunflower Oil (4x185g) in Tesco | mySupermarket
John West Wild Red Salmon (213g) in Tesco | mySupermarket
Princes Tuna Chunks in Brine (4x185g) in Tesco | mySupermarket
Princes Tuna Chunks in Spring Water (4x185g) in Tesco | mySupermarket
Princes Wild Pink Salmon Canned from Fresh (213g) in Tesco | mySupermarket
Princes Corned Beef Lean (200g) in Tesco | mySupermarket