There are *loads of* food and drink *I* wish wasn't discontinued (some have even changed appearance - colour, shape, etc.)
Roses Strawberry Dreams (since 2009, they're no longer dome shaped)
Roses Orange Cremes (some time in the 2000s, they're no longer the cup shape they were in the 90s)
Quality Street Caramel Cups (they're no longer cup shaped as of post-2006)
Milk Tray Eastern Delight (removed just last year, for Milk Tray's gigantic milestone 100th anniversary) [double whammy - since 2009, the Turkish delight filling was even changed to a light brown colour]
Milk Tray Strawberry Kiss (another Milk Tray chocolate changed as of 2009 - the strawberry fondant filling is now actually pink in colour)
Milk Tray Hazelnut Caress (removed just last year, apparently due to complaints about the selection having too many chocolates containing both nuts and caramel)
Milk Tray Caramel Charm (now re-formulated to a salted caramel charm, 'to keep up with current flavour trends')
it seems Milk Tray no longer contains Honey Love (I don't know why, though)
Ketchips (Bird's Eye *had* to delist these, owing to health and safety issues with the ketchup inside them getting too hot, and burning the mouths of people eating them)
Kick Off lollies (Wall's made these in April 1996; they were vanilla and strawberry flavour ice cream, and were in the shape of a football boot)
Mr. Long ice lollies (Wall's made these in April 1996; hence the name, they were 'very long') [they were lemonade flavour water ice lollies, with strawberry spirals]
Spider Man ice lollies (Wall's made these in April 1996; they were red on the outside and blue on the inside) [they were strawberry flavour on the outside and blue bubblegum flavour on the inside]
Dennis the Menace ice lollies (Wall's made these in April 1996; they were strawberry and cola ice lollies, with a chocolate coating and chocolate vermicelli)
Freaky Foot lollies (Wall's made these in the late 80s; they were vanilla ice cream with a strawberry ripple) [I know Wall's brought them back last year, but, unfortunately, they're now just vanilla and strawberry flavour ice cream]
Big Gum lollies (Wall's made these in summer 2003; they were vanilla ice cream with raspberry stripes)
'Orrible Ogre ice lollies (Wall's made these in 1994; they were blackcurrant flavour ice lollies)
Piranha ice lollies (Dale Farm made these in 2000; they were pineapple and blackcurrant flavour water ices, with an orange popping candy) [was there an orange flavour water ice, as well?]
Cyclone ice lollies (Dale Farm made these in 2000; this product was an orange, lemon and strawberry sorbet)
Viper ice lollies (Dale Farm made these in 2001; they were pineapple and tutti-frutti flavour water ices, with a lemon-lime popping candy)
Gini (I think this is still available in France, but it's definitely discontinued in the UK)
Ross Vegetable Hotpot (it was frozen, in a cardboard box and microwaveable; it was carrots, broccoli and green beans in a savoury sauce, topped with sliced potatoes) [the savoury sauce was like a white sauce, and it was cheese-free] I first had this in 2004, and the last time I ever had it was the following leap year - 2008 (I don't know the exact year Heinz - who Ross are a division of - delisted it)