Roker has written UK chart hits for Jackie Lee, The Fortunes, Barry Blue, Tina Charles, Polly Brown, The Pearls, The Real Thing and Sweet Dreams.
Together they penned "Storm in a Teacup" for The Fortunes,[7][8] which landed them a Top Ten hit single;[9] "When You've Gotta Go" which made the Dutch Tipparade (peak number 17) in late 1972,[10] as well as the lower reaches of the Australian Aria chart in 1973;[11] and also de Paul's third single, "All Night", which made the UK chart breakers listing in May 1973[8] and No.
[12] 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.
[13] Roker also began writing with De Paul's partner Barry Blue, (with whom he is often confused) notably on the song, "Do You Wanna Dance",[8] a Top Ten hit at the end of 1973,[14] as well as some album tracks.
[29] 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".
That year his protégé group, Two Way (featuring actor Anthony Head), released a single "Face in the Window", penned by the same writers.