Offramp wrote:
It is very hard to guess which Ticket Offices are currently still open and which are shut.

Canden Town has shut but Chalk Farm is open. Victoria is open but I
believe King's Cross is shut.Tooting Broadway and Colliers Wood are both still open.

I wonder if there is a list anywhere?

Kings Cross St Pancras had three ticket offices. The last time I looked,
two of them were still open.