Site: National Provincial Bank at Bishopsgate (1 memorial)
EC2, Bishopsgate, Gibson Hall
From Wikipedia "The Gibson Hall is a Grade I listed building on Bishopsgate in the City of London. The building is named after its architect, John Gibson {this being his best-known work}. Built of Portland stone in the classical style with engaged Corinthian columns, the building was commissioned as a new head office by the directors of the National Provincial Bank of England and completed in 1865. ... In 1967, National Provincial Bank moved its head office to Drapers Gardens, 12 Throgmorton Avenue."
Wikipedia also says that "the bishop's gate device was part of a pictorial representation of the bank's address" in Bishopsgate. But it's nothing like. However, it is very similar to the last (1735) Bishopsgate itself, as shown in a drawing at British History On-line.
