HC Deb 16 March 1965 vol 708 c225W
41. Mr. Wall

asked the Postmaster-General what is the approximate time a subscriber in London has to wait before he can obtain an answer from the exchange in order to put through a trunk call.

Mr. Joseph Slater

The average times to answer for auto-manual exchanges in the London Telecommunication Region are about 7½ seconds by day and 7 seconds during the evening.