Sydney Piddington spent time in Changi Prisoner of War camp during World War II. He discovered that maintaining the morale of prisoners in the camp was essential, and worked with fellow prisoner of war Russell Braddon to develop a mentalism act as entertainment for the troops. During this time, Sydney developed many unique and innovative techniques to give the appearance of mind-reading.
Following the war, Sydney married Lesley Pope, and taught her many of the tricks that he had developed. Together they designed a stage act, and found success on Australian stages. Soon after, the Piddingtons moved to London, and in time they were signed to present a series of live radio broadcasts for the BBC. Seeking ever-impressive stunts, Sydney masterminded specialized tests to demonstrate Lesley's alleged ability to receive thoughts over a great distance.
Many of the original radio broadcasts are still available. Among the more famous demonstrations undertaken by the Piddingtons were:
The Diving Bell Experiment - Lesley was submerged in a diving bell in a swimming pool in Surrey whilst Sydney conducted tests with a live audience at the BBC studios in central London.
The Tower of London - Lesley was kept under armed guard at the Tower of London across the river from the BBC studios, and was still able to determine items and names from the live audience.
The Stratocruiser Broadcast - A famous experiment where Lesley was taken to cruising altitude in a plane above a British military base. Amongst other demonstrations, she was able to determine the personal possessions of an audience member chosen at random by the panel of judges in the studio.
The methods behind the Piddingtons' act were a closely guarded secret, unknown even to the producers at the BBC. Following Sydney's death in 1991, Lesley is said to have told her son, "Even if I wanted to tell you how it was done, I don't think I would be able".
To this day, The Piddingtons are considered to be one of the greatest two-person telepathy acts of all time. Magicians have speculated that they may have utilized codes, confederates or mechanical aids.
The controls for their experiments have been criticized. Regarding their experiment that took place in the Tower of London, Lesley had produced a sentence that had been written on a blackboard in the BBC studio. However, the sentence had already been read on the radio to listeners. Psychologist Robert H. Thouless noted that "no examination of Mrs Piddington's clothes or hair seems to have been made to ensure that she had not a wireless receiving set concealed on her person."
In 2015, Martin Hart published a book which claimed to have finally revealed the secrets to the Piddington's tricks. The book is based on a notebook by Hart’s grandfather who observed their methods while working on the BBC broadcasts.