"Ask a P'liceman" (sometimes given as "If You Want to Know the Time Ask a Policeman") is a music hall song.

[1] Fawn was known as one of the best comedic impersonators of a drunken person.

The song was "filled with references that reflected the Victorian working-class mistrust of the officers of the law",[2] and made fun of the frequent claim that, if arrested for drunkenness, one's pocket watch was likely to go missing at the police station,[3] with the line "Every member of the force / Has a watch and chain, of course."

The sheet music of the song reportedly sold some half a million copies within three years of its publication.

[1] The song's title was used for Will Hay's 1939 comedy film Ask a Policeman.