London titles 1900-1939
Surely a major London Daily and Evening title up to WW2, since many provincials use their stories to fill their own gaps, and you have been focusing lots recently on the provincials anyway.
Joseph Burdett commented
The 'Star' and 'Standard' were very important papers between the two Wars - you should now concentrate on digitising them, for us who are not able to go to the British Library!
Yes agree with comments above.