HP Sauce, Crumpets, Pork Pie, Maltesers for instance
HP sauce and Maltesers can be got from Allegro. Crumpets are at M&S. Pork pies are harder, I guess your nearest source would be M&S in Prague.
Bird's custard powder, Bisto, Colman's mustard immediately spring to mind.
The British shop on Emilii Plater has all of those (at a price).
Bovril which we also can't get here.
Again, the British shop on Emilii Plater has that.
I'm fairly sure some of the posters here have used this service :-
I've used them in the past but these days I get everything from Allegro or just when I'm in the UK.
dont think many brit expats could afford this on polish wages.
You don't think that Polish salaries can stretch to an extra 1.80zl for a can of beans? You really have got a lot to learn about Poland and Poles.
English mustard is hard to find
M&S have an excellent range of English mustards.
The last time I brought Marmite, the lads at Heathrow confiscated it. Two huge jars. They were sympathetic but took it anyway, along with several kilos of semtex cheddar.
Marmite I know you can't take back (it falls foul of the regulations on liquids), but that's the first I've heard of cheddar being confiscated. I always warn the staff on the x-ray machine that my bag contains "A lot of organic material and several slabs of cheese, which I've been told in the past x-rays exactly like something I won't say the name of here".