Waitrose own brand baked bean inside base and wall of the tin (bottom half) look suspicious as if the shining coating had reacted with the ingredients, changed the shining appearance into a dull pattern (corrosion?). Waitrose HQ refused to give advice as to whether it is safe to eat despite being asked three times. They ended their email say "..nothing to add further.". Where is their Duty of Care to the public - negligence, arrogance !. They also refused to refund the 2 unopened tin I took back to the store because I did not have the other two tins as a pack of 4. I left them these two tins + one empty so they can see the issue I raised. They clearly value their £1ish greatly and forgot about the Consumer Rights - can't sell damaged goods. They have lost my trust as a quality supermarket. I have bought myself a trolley so I can buy least half of my weekly shopping in M&S a few minutes walk away.