According to the Internet source given below, Sir Henry Lytton [Henry Alfred Jones] was an English actor and singer who was the leading exponent of the comic patter-baritone roles in Gilbert and Sullivan operas from 1909 to 1934. He also starred in musical comedies. His career with the D'Oyly Carte Opera Company spanned 50 years, and he is the only person ever knighted for achievements as a Gilbert and Sullivan
Obviously neither a pub, music hall or vaudeville singer, he graces this domain due to common repertoire with other prominent such performers. One example to whit:
When I Marry Amelia
(1901 - music: Lionel Monckton
; words: Adrian Ross).
||Biography by wikipedia.org.