Service Information bulletins would be preceded with a clock for two minutes and a catchy theme which was called Walk & Talk, played by the Syd Dale Orchestra, later replaced in 1978 with Swirly by Roger Limb.
Then there would be a recap of the day's transmitter news followed by a caption showing the address of the BBC Engineering Information Department.
"And now we are returning to the colour test card and music until Play School at eleven o'clock" would be a familiar closing phrase.
A Monday to Friday Tuning Information bulletin was added to BBC2 in the heyday of colour coming to BBC1 and ITV from 10 November 1969 to 31 December 1970 at 6.15pm.
Here they could deliver concise and informative speech for a few minutes at a time and broadcast relatively safely to a smaller than usual viewing audience.
Group B aerials with horizontal rods are required for receiving the 625-line transmissions from Preseley and they should be directed towards the site of the station which is about nine miles South of Cardigan.
Following successful Test Transmissions, the full stereo programme service will be broadcast from the BBC's Holme Moss and Belmont transmitting stations starting tomorrow.
Radio Three has been transmitted in stereo from Holme Moss for several years but from now on it will use the new pulse-code modulation distribution system along with the other programmes giving a consequent improvement in technical quality.
At some receiving locations near the limit of the service areas of the transmitting stations concerned the change from monophonic to stereophonic reception may introduce additional background noise and this can often be reduced by using a more efficient aerial system and listeners in these circumstances should seek the advice of their local radio dealer.
Well, today is the last day of the trade test colour films which have been transmitted regularly by BBC Television since 1954.