We noticed this when passing through Embankment the other day – all the shops in the ticket hall area have now been closed – permanently – and the southern entrance/exit is having tiling work done.
We spoke to a member of station staff who said that the shops were going to be replaced with a ‘Pop up shop’ instead, followed quickly by ‘Or maybe a Marks & Spencer’s’, which seem like two different things to us. We’ll keep an eye on it, to see what they put there … but that means we’ll have to update our App (and Map!) for facilities at this station!