He was a goofy-looking bucktoothed little guy who sang funny songs with titles like "Swimmin' With The Wimmin" in a high, thin voice, while playing something called a 'banjolele' (a cross between a banjo and a ukulele.) He was also Britain's single most popular entertainer in the late '30s.
Many dozens of George Formby Jr's cheerful, clever, sometimes naughty double-entendre (i.e.: "With My Little Ukulele in My Hand") songs have been put up for free download to archive.org by some kind soul, and apart from being essential listening to fans of vintage novelty music, it's also a peek into the style of music hall entertainment that the typical Brit enjoyed back in the day. Whether performing live, acting in films, or recording, Formby was massively successful and influential to generations of British funnymen, from Benny Hill right up to Mr B The Gentleman Rhymer, even if the suggestive nature of his songs led him to sometimes be banned by the BBC.
George Formby Jr on archive.org
One of his most famous tunes, "When I'm Cleaning Windows":