Some stations pong in a nasty way. I always thought that Wapping on the ELL smells of the river Thames and winkles. . Which station do you nominate?
Warrington Bank Quay when the wind carry's the strong smell of soap powder from the adjacent factory,used to be Joseph Crosfields Ltd now owned by Inios, a Dutch company I believe.
Your quite right about Euston - whenever the doors of the pendo's open it smells like an dodgy underpass.Last time I went to Euston it stunk of sewage.
I guess that's what happens when you have a station full a pendos