Editing BBC Home Service (section)

===1939–1940: Start of World War II===
On 1 September 1939, the BBC merged the two programmes into one national service from London. The reasons given included the need to prevent [[Luftwaffe|enemy aircraft]] from using differentiated output from the Regional Programme's transmitters as [[radio beacon|navigational beacons]]. To this end, the former regional transmitters were synchronised in chains on (initially) two frequencies, 668 (South) and 767&nbsp;kHz (North), with an additional chain of low-powered transmitters (known as "Group H") on 1474&nbsp;kHz appearing later.<ref>{{cite web|url=http://www.mds975.co.uk/Content/ukradio.html|title=UK Radio History 1, Marconi, 2LO, BBC and Radio Normandy by Mike Smith|access-date=2011-06-04|url-status=dead|archive-url=https://web.archive.org/web/20110611090521/http://www.mds975.co.uk/Content/ukradio.html|archive-date=11 June 2011}}</ref> Under this arrangement, regional broadcasting in its pre-war form was no longer feasible, but much of the programming was gradually decentralised to the former regional studios because of the risks from [[Strategic bombing during World War II|enemy attack or bombing]] in London to broadcasting nationally.

This new station was named the ''Home Service'', which was also the internal designation at the BBC for domestic radio broadcasting (the organisation had also both the [[BBC One|Television]] and [[BBC World Service|Overseas Service]] departments). During the war, BBC Home Service would air each day from 7.00 am until 12.15 am, with main news bulletins airing at 7.00 am, 8.00 am, 1.00 pm, 6.00 pm, 9.00 pm and midnight.

The Home Service continued in this form until the end of World War II.<ref>Radio Times 1940 – 1945 BBC Genome</ref>