I know of one dogged Brent councillor who managed to get one removed but for the most part they lie on the street, unused, disconnected (for phone calls), increasingly neglected and damaged...
But becuase the firm that put them up doesn't exist there appears to be some kind of arcane reason why they can't be taken down by the Local Authority (in this case Brent).
Well, there's a new way in town and it occurred here on the Kilburn High Road - badly damaged by a passing truck and it was removed as dangerous.
:-))