[1] He worked with the Pete Lemer Quintet, Spontaneous Music Ensemble, Annette Peacock, Harry Beckett, Gilgamesh, Baker Gurvitz Army, Seventh Wave, Harry Beckett's Joy Unlimited, Pierre Moerlen's Gong, Mike Oldfield Group, In Cahoots, and Miller/Baker/Lemer.

[2] This band successfully played a season at Ronnie Scott's and helped to pave the way for the British free jazz movement of the late 1960s and early 1970s, along with the Mike Taylor trio.

Paraphernalia became the most frequently performing jazz-oriented group in Europe, and Lemer was keyboardist for most of the years up to the present, including ten albums recorded live or at Thompson and Hiseman's Temple Music Studios.

In 1974, he joined Ken Elliot's Seventh Wave, a pioneer synthesiser-based rock band, appearing on their second album, Psi-Fi.

In 1976, he joined Jan Dukes de Grey briefly to record their final album, Strange Terrain.

He joined the band Paraphernalia in 1987 and played on the albums A Cry from the Heart (1987), Everlasting Flame (1993) and Shifting Sands.