Radio Four listeners heard Mr Johnson reveal that he had been a mod in his teenage years.
Having started his working life as a postman, he admitted that he would rather be the lead singer in a band than prime minister.
His desert island discs were as follows: 'And Your Bird Can Sing', The Beatles; 'You Little Fool', Elvis Costello & the Attractions; 'Friday On My Mind', Easy Beats; 'Drive-in Saturday', David Bowie; 'A Man Needs a Maid', Neil Young and the London Symphony Orchestra; 'Adagietto' from Mahler's Symphony No 5 in C Sharp Minor, The Royal Philharmonic Orchestra conducted by Frank Shipway; 'Cityscape Skybaby', Super Furry Animals; 'Beneath The Sun', Halima.
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