This is "Crossrail", aka the Elizabeth Line, the Tube's major new extension that opened this week (after years of delays.) So it hasn't had much chance to get dirty yet.
Beggars and homeless people are common in London, but less common on the Tube since you can't get very far inside most stations without a ticket.
Beggars and homeless people are common in London, but less common on the Tube since you can't get very far inside most stations without a ticket.