The world's oldest emergency call service was introduced first in London area in 1937. What telephone number was used?

Question

Which bank, which had opened in 1762 (and was the oldest merchant bank in London) collapsed in 1995 after one of the bank's employees lost £827 million ($1.3 billion) speculating primarily on futures contracts?

Answer 1

999
The service was introduced following a house fire in which 5 people were killed, when a call to the fire brigade was held up at the local telephone exchange. It is the world's oldest emergency call telephone service. 999 is still the official emergency number for the United Kingdom in the 21st century, although calls are also accepted on the European Union emergency number, 112. Countries and territories also using 999 as the emergency number during the 21st century include Bahrain, Bangladesh, Botswana, Eswatini, Ghana, Hong Kong, Ireland, the Isle of Man, Kenya, Macau, Malaysia, Mauritius, Poland, Qatar, Sudan, Saudi Arabia, Singapore, Trinidad and Tobago, the Seychelles, Uganda, the United Arab Emirates, and Zimbabwe.