National Portrait Gallery Café
I used to work near Charing Cross on a regular basis and the Portrait Café at the NPG was an oasis!
Consistency is a virtue
I always find the staff friendly, the food fresh and coffee well made. Some people think the lady in charge looks stern but I have found she does smile and has a sense of humour. I recommend their cakes when you need reviving in central London.
Coming in from the St Martins entrance you pass the temporary photo exhibition which at least is interesting if not really good. Then a stroll through the bookshop and I find focusing on refreshments stops me from browsing and buying books.
One of the pleasures of this cafe is sitting at a table under the glass ceiling when it rains. Seeing and hearing the rain falling from a comfortable cafe is always a treat.