in Cologne recently I had very dark, dense german bread full of rye seeds with a malty, sometimes fruity flavour -it is usually thinly sliced with no crust. a slice looks a bit like a cork mat - I think is called vollkorn brot or perhaps a type of westphalian pumperknickel. Does anyone know if this is available to buy in UK? If so, where?

You can get pumpernickel bread in most super markets i have seen it in waitrose, Salisbury's and tesco's, it comes pre-sliced have a look around where the muffins, pitta breads and other specialty breads are

Thanks, I have checked the major supermarkets before without success but I found some Vollkorn brot in Tesco on Saturday. Not as good as I had in Germany but pretty good.
I think it may be available here in selected stores only. I am in S. Yorkshire and I don't know of any Waitrose or Salisburys. Thanks again.