Site Name: Chancery Lane deep shelter & Kingsway telephone exchange
31 - 33 High Holborn
Sub Brit visit 13th July 1996 & 25th February 2008
Switching equipment in one of the large diameter tubes (either First, Second, Third or Fourth Avenues). Two motor selectors and and MUGS (Motion Uni Group Selectors) are seen on the far right.
Copyright photo from BT Archive