Øystein Andersen is the real name and he is a very fine drummer.
In the late 80's he played in Sha-Boom together with Dag Finn (v), Peo Tyren (b), Hasse Lind (k), John Sandh (g) and Andy Scott (g) - yes believe it or not. Mick Tucker helped with backing vocals on some tracks and Andy Scott produced quite a lot of their records of which one of them was Fox On The Run.
In 1991 when Mick Tucker had to leave a Sweet tour in Scandinavia, Bobby took over and helped Andy finishing the tour.