George Formby was a legendary British star of stage, screen and record. At the height of his fame in the 1930s and 1940s Formby was probably the most famous man in the land. A gifted entertainer and musician, Formby is still highly regarded as one of the UKs greatest entertainers.
Blackpool Rock was one of, if not the very, first song that had to be edited to be played on the BBC, back in 1937, Formby's double entendres were impressively sophisticated, especially if all the ones we can see now were intended.
The song was written by Harry Gifford and Fred Cliffe who wrote many of Formby's songs, George occasionally altering some of the lyrics.
Looking up the songwriters, Gifford it appears also co-wrote a song called Underneath Your Mushroom Umbrella, which I have never heard but my imagination is doing a good job writing it.
The song includes lyrics such as
It may be sticky but I never complain, it's nice to have a nibble at it now and again
More on George Formby here
and now a bit of Blackpool Rock