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A few replies - I have tried most of your suggestions, but a lot of them include gritty bits at the bottom of the cup, which is what I am trying to avoid. I have tried the two Percols suggested. ( I have no Aldi within reach. ) I do have a cafetiere and a percolator, both of which I use on appropriate occasions. And yes, alas, I have tried coffee on a railway station. Coventry, to be precise. I don't know if you can burn dogp**s, but if you can, that's what it would have tasted of. Utterly filthy stuff.