With wife Lesley [Pope] Piddington, part of the mind-reading stage act The Piddingtons.
Sidney Piddington learnt his mind-reading act when in Changi Prison during World War II, when he would give demonstrations of thought transference with fellow A.I.F. prisoner Russell Braddon ('Transference of Thought in Radio Broadcast', Sydney Morning Herald, 5 July 1947, p.15).
On his release, he married Lesley Pope, a stage actress, and the two became a mind-reading duo, performing together as early as 1947. In late 1948, the couple moved to England ('Piddingtons to Try Luck in England', Newcastle Sun, 9 December 1948, p.4), where they successfully (though not without some criticism) performed the act for some years.
The mind-reading act ended in London in 1952, and Sidney Piddington went to work in the publishing industry ('London Talk', Australian Women's Weekly, 4 March 1953, p.20).
The couple returned to Australia in 1954 ('Telepathy–All Past', Sydney Morning Herald, 1 April 1954, p.4 [women's section]).