A reference to Sir Alan Patrick Herbert (1890-1971) who was generally known as A.P. Herbert or A.P.H..
He was a British Member of Parliament, as well as a novelist and playwright. One of the causes he took up as an M.P. were the very complex British licensing laws of his period.
In the early 1930s, darts as a pub game was banned in Huddersfield, and later in the decade, in Liverpool and Glasgow. A.P. Herbert argued against these bans in parliament.