As the possessor of about 20 Uriah Heep albums I have no knowledge of Barry ever being a member and can find no mention of him on the CDs.
However, if Wiki is to be believed......
"Barry Blue (born Barry Ian Green, 4 December 1950, London[1]) is a singer / producer / songwriter from the United Kingdom. He is best known for his hit songs, "Dancin' (on a Saturday Night)" and "Do You Wanna Dance" (both 1973).
At 14 he signed to record producer Norrie Paramor whose erstwhile assistant was one Tim Rice - the producer of Barry's first song "Rainmaker Girl" which became a hit for Gene Pitney in America. Later he became bass player in the original line-up of heavy rock band Uriah Heep, followed in 1966 by a two-year period in A&R at the Bee Gees' publishing company Abigail Music. In 1970 he signed as a writer to ATV-Kirshner. His first major hit was "Sugar Me" which became a hit for Lynsey de Paul and was the first of a series of hits that they co-wrote".