"To mark the 75th Anniversary of the biggest “Blitz” raid on London — The Second Great Fire of London — The City of London has given permission for an air raid siren to be sounded at 18:05 on 29 December.
This will be followed by an escorted “Blitz Turnout” when WWII vintage fire appliances will leave Dowgate Fire Station (Lower Thames Street) and circuit the City “on the bell”.
The vintage fire engines will be on display earlier in the day, from 10:30am outside the front of St Paul’s Cathedral."
87-89 Saffron Hill was the Head Office of Aircraft-Marine Products, Great Britain (known as AMP). They had factories in Port Glasgow (closed in 1999) and Bideford (later Tyco Electronics) which closed in 2013.