A few people have mentioned mushroom and wine pasta 'n' sauce. I also miss the smoky bacon flavour - used to love it when the sauce hadn't been properly mixed before microwaving and you'd end up with clumps of powdery, salty bacon flavour stuff stuck inside the pasta. I also used to add double the recommended amount of butter to the mushroom one. Lush!
Secret bars - I would love these to come back
Spira
Fuse bar
mavericks
Nova bars - nobody seems to remember these but it was a thick bed of chocolate with a sort of oaty/granola/honey and raisin topping. They came as two short bars like a bounty.
coconut boosts.
Thorntons Toffee Tempo bars
M&S extremely fudgy chocolate bars
Wheat crunchies
nice'n'spicy nik naks - I loved these so much I named my hamster NikNak.
spicy tomato wotsits
M&S used to us a potato-based snack called deltas - little salted triangles - they were gorgeous.
Worcestershire sauce twiglets (occasionally see these in home Bargains)
lemon polos
fruit polos
peach smints
Asda used to do am amazing pasta salad with smoked bacon, mayonnaise and cheese - many places offer something similar but none come close to the taste of this one.
M&S Chinese-style chicken drumsticks - they still make them but the recipe has changed. My mum used to buy a big tub of these and we'd have two each for lunch each day, usually served alongside the bacon pasta salad mentioned above!
Gini - a fizzy lemon drink
Tab Clear
Mountain Dew
Snapple
Fruitopia
Body shop peppermint foot cream
Toni and Guy curl taming shampoo and conditioner.
I wonder what our kids will miss in the future. Will they all be sitting around saying, "remember hummus? I wish they'd bring it back" 