Roker first worked as a song-plugger. His first taste of chart success was provided by the theme music to children's TV programmeThe Adventures of Rupert Bear. The song "Rupert", co-written with Len Beadle and recorded by Beadle's wife Jackie Lee, made the UK Singles Chart in 1971. He also wrote the theme for Inigo Pipkin. Further success was attained when Roker met up with Lynsey Rubin. Together they penned "Storm in a Teacup" for The Fortunes, which landed them a Top Ten hit single; "When You've Gotta Go" which made the Dutch Tipparade in late 1972, as well as the lower reaches of the Australian Aria chart in 1973; and also de Paul's third single, "All Night", which made the UK chart breakers listing in May 1973 and No. 17 on the Dutch Single Tip chart. Together with de Paul, he also wrote "Taking It On" and "It's Been a Long Time", both recorded by the Young Generation on their 1973 album Give Me Love.. Roker also began writing with De Paul's partner Barry Blue, notably on the song, "Do You Wanna Dance", a Top Ten hit at the end of 1973, as well as some album tracks. The three of them also wrote "Sugarloaf Hill" released as a single by Del Davis. Moving from pop to a more soulful/dance vein, he was behind the Tina Charles hits "Love Bug" and "Dance Little Lady Dance". His profile in the US benefited from Dionne Warwick recording one of his songs, "Do You Believe in Love at First Sight", and this became the theme song of the film of the same name, starring Dan Aykroyd. "Up in a Puff of Smoke", also written by Roker and recorded by Polly Brown, was a Top 20 hit in America in the 1970s and charted in the UK.. Together with Gerry Shury, he wrote "Guilty", which was recorded both by The Pearls and First Choice and was a hit onboth sides of the Atlantic. One song he did not write was Sweet Dreams' cover version of the ABBA song "Honey, Honey", although Roker actually sang the male vocal on that record, in a duet with Polly Brown. He also co-wrote and co-produced "Stone Cold Love Affair", a 1975 single by The Real Thing. In 1983, Roker resurfaced with Jan Pulsford and Phil Wigger as the songwriters of the UK's Eurovision Song Contest entry, "I'm Never Giving it Up". It was recorded by another band called Sweet Dreams, which came in sixth in the song contest. That year his protégé group, Two Way, released a single "Face in the Window", penned by the same writers.
