Tangerine Dream performed on this day in 1975 at Friars Vale Hall in Aylesbury, England.
The group were at this time about halfway through their 1975 UK Tour. During this tour, the group performed long sets of improvised music in venues ranging from large cathedrals to small music clubs. Right before the tour began, Edgar Froese, one of the members of the group, had released a solo album, Epsilon in Malaysia Pale. Based on recordings from this tour, the mellotron-dominated sound of the album neatly prefigured what the concerts actually sounded like.
A portion of this concert was known to have been recorded. It was released as part of the Tangerine Tree project.