These are the programmes that the BBC holds from the 1940s:
1946
24th June Demonstration Film: Television is Here Again
25th July G.B. Shaw (90th Birthday interview)
25th September Nuremberg Judgements (film seqs)
9th November Lord Mayor’s Show
31st December Scrapbook Nineteen Forty-Six: First Year Flashbacks
1947
Rugby: Cardiff v France 1947 Veterans Match at Cardiff Arms Park (logged on 1/1/47 but real tx date unknown)
Rugby: Cardiff v Nantes/Cognac (f/r (?) – logged on 1/1/47 but tx date unknown)
2nd June Royal Tour of South Africa 1947
11th June Princess Elizabeth at the Guildhall Receiving Freedom of the City of London (film seq)
29th June Bishop of London’s Address
7th October Variety in Sepia (Adelaide Hall excerpt) (experimental telerecording)
22nd October Unveiling of the National Memorial Statue of King George V
29th October Edmundo Ros (experimental telerecording)
20th November The Royal Wedding: The Marriage of HRH Princess Elizabeth with Lieutenant Philip Mountbatten RN in Westminster Abbey (part f/r)
4th December Their Majesties the King and Queen at Broadcasting House: ITMA (experimental telerecording)
31st December Television Films of the Year: Scrapbook Nineteen Forty-Seven
1948
13th April Britain’s Tribute to Franklin Delano Roosevelt
29th July Olympic Broadcasts 1948 (compilation?)
1949
28th April Springbok Route to Johannesburg
15th May News Special: Blockade Ends
9th June Trooping the Colour (f/r excerpt)
1st August Flashback: London August Bank Holiday 1949 (tx date may be wrong)
2nd October Around the World in Eight Days
6th October Old Songs for New (Adelaide Hall – f/r excerpt)
6th November Remembrance Sunday: Remembrance Day Service: The Cenotaph (f/r)
18th November Personal Impressions: Robert Flaherty (f/r)
17th December Television Comes to the Midlands (f/r excerpt)
30th December London Town (film item)
This list does not include Newsreels which exist at least in part for most editions from 5/1/48 (the first edition), very few exist complete with the original soundtrack. Initially Newsreel went out every few days, and ended up as a 5 day a week programme before being amalgamated with the News itself (previously a sound-only service) in July 1954.