A direct Speaking Clock feed existed to the BBC. I remember in about 1983 visiting a BBC building on the Embankment just round the corner from Westminster tube station, it was no 1 (can’t remember the name of the road). It was a half derelict building covered in pigeon sh*t, but on the second floor was the BBC Parliamentary Recording Unit. It was linked via cables under the road to the Houses of Commons and Lords. This was a place that looked like a museum but was fully operational.
The thing that I found amusing was the fact that they recorded all the material in mono on one track of the tape recorder, and recorded TIM on the other track as a quick time reference. Because the pips were rather good at breaking through to the other speech track, this particular TIM, provided by BT, did not have any pips and was known by the BBC as “seedless TIM”.