Highgate Wood telephone exchange

The Highgate Wood Telephone Exchange was the first all-electronic telephone exchange in Britain. It was built in the London suburb of Highgate Wood by members from Joint Electronic Research Council .
On Wednesday 12 December 1962, the 800 line Highgate Wood exchange was accepted by the Postmaster General, Mr. Reginald Bevins, MP, on behalf of the Post Office, from the five manufacturers who had helped to build it, the first all-electronic telephone exchange in Britain and one of the first in the world to go into public service. It had already carried public traffic experimentally for brief periods during the previous few weeks. He also announced on that day the building of three more advanced electronic exchanges to be installed and in operation within the next two years at Goring-on-Thames , Pembury , and at Leighton Buzzard. The only one that was completed was the TXE1 at Leighton Buzzard, the other two being quickly abandoned.

Wikipedia