Jingoism and a general feeling of self entitlement.
But seriously….
Kettle Chips are avaliable in Germany and as such so are salt n vinegar, too. Kettle have even introduced paprika flavoured crisps for the German Market. You could go for shitty crisps like Hula-Hoops, Quavers, Monster Munch and the like. Riffled crisps are exciting and exotic here.
Marmite is on the shelves, albeit at 8€ for a medium jar. Bovril isn’t.
“Proper” tea, as in black and in a bag, is hard to find. German supermarkets have a whole aisle dedicated to tea, but it’s mostly fake tea like strawberry, fennel with aniseed, blackberry or some other made up shite.
Proper ales are hard to find, although there are a fair number of smaller breweries doing their version of a hoppy IPA and it’s all the better for it. There is only so much larger you can drink, and trust me, I’ve tried.
Decent sausages and proper bacon, i.e. not crappy American wafer thin crap, are hard to find. Their sausages have the consistency of something that has been through the grinder several times over and are generally devoid of any seasoning. Oh, and the Currywurst is an English invention thanks to the soldiers stationed in Berlin who had the idea of throwing some curry powder into the mashed up meat.
Nice biscuits are few and far between. Their offerings are usually incredibly dry and with some shitty kind of dried up Nutella. Hard to find decent dunkers. Shortbread is in the normal supermarkets.
Iced buns and that sort of sickly stuff isn’t available in the bakery, thank god.
Crumpets are none existent.
Worcester sauce is available. HP sauce isn’t, but they’ve not got decent bacon to go with it anyhow.
Baked beans are everywhere. I personally find Edeka’s own (German Tesco) better than Heinz as they’re not as sweet.
Decent pubs, rather than bare walled beer halls, but I guess you can’t put one in your suitcase. Honestly, that’s about the only thing I miss about Britain.