Not sure whose initials those are, but this is The Ivy, Clifton, formely NatWest bank, on the corner of The Mall and Caledonia Place. The listing says of 32-44 Caledonia Place, "he left-hand end pair rebuilt as one in 1922 to form a bank", and mentions 'the monogram "NUP"'
GPS Coordinates:
51.45489, -2.62074
Location: Clifton Central