Similarly, the Regional Programme broadcast much more light and dance music than its successor, the Home Service.

The experiments proved successful and on 27 July 1925, the Chelmsford longwave transmitter was relocated to a more central site at Borough Hill near Daventry in Northamptonshire.

On 21 August 1927, the BBC opened a high-power medium wave transmitter at the Daventry 5GB site to replace the existing local stations in the English Midlands, that allowed the experimental longwave transmitter 5XX to provide a service programmed from London for the majority of the population, this came to be called the National Programme.

By 1939 as the Regional Programme network expanded, the three remaining medium wave transmitters – at Brookmans Park (for London and the South East), Moorside Edge (for the North), and Westerglen (for central Scotland) – were all using 1149 kHz.

BBC News on the National Programme would not air until at least 6.00 pm each day, this was in agreement with several newspapers to ensure people would buy a morning edition.