I have been listening to some fine recordings by Tony Crombie and His Rockets. Along with Tommy Steele and The Steele Men they were the pioneers of British Rock&Roll .They obviously modelled themselves on Bill Haley and His Comets and other American acts but they were fine jazz musicians, a case of cashing in on the success of Rock and Roll. Jet Harris played stand up double bass at one time,but I don`t know if he played on any of there records. 1956 was the year for the early British Rock and Roll pioneers other younger artists did not get going until a couple of years after that.
http://www.youtube.com/watch?v=JD8G2Py9cZQ