While in the UK, Simon co-wrote several songs with Bruce Woodley of the Australian pop group the Seekers, including "I Wish You Could Be Here," "Cloudy", and "Red Rubber Ball".
Semasa tinggal di London, Simon berkolaborasi menciptakan sejumlah lagu dengan Bruce Woodley dari The Seekers, seperti "I Wish You Could Be Here", "Cloudy", dan "Red Rubber Ball".