In message , Robin Mayes
writes

"Fossil" wrote in message
...
My vote has to be the Northern Line, every time I travel on that line I
always have black 'dirt' in my nose.. no its not bogey/snot!

Belsize Park station has the highest dust quantity ISTR.

Seeing that it seems to cling more to magnetic surfaces, it must contain
a high proportion of iron so at least we won't be anaemic on Section
12s...
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Kat Me, Ambivalent? Well, yes and no.