On 23 Sep, 12:56, wrote:
I walked past the old entrance building to euston underground recently and
surprisingly it hadn't been turned into a shop but was shuttered up and
had lots of machinery noises coming from inside it. Whats it used for now,
ventilation? Are the passageways inside still connected to the station or
are they blocked off?

B2003

Which one, you mean the Hampstead Tube one at the corner of Drummond
Street? I think the CSL one has been obliterated, but would have been
somewhere near where the bus station meets Eversholt Street.