At 25 Longmoore Street Pimlico (stretching the definition of "West End" a bit):
And just down the way at 36 Longmoore Street:

And at 72 Brook Street:

To save straining your eyes, (I think) it reads "public shelters in vaults under pavements in this street".
Moving on to between 42 and 48 Brook Street, near Grosvenor Square:
And at 72 Brook Street: