Jason Crest has been played on NTS shows including Black Impulse, with Black Mass first played on 1 September 2018.

Jason Crest was a British psychedelic group from Tonbridge who signed to Philips in 1967. None of their singles were hits and the album remains "in the can". Despite this, the long player has been quite heavily bootlegged and many of their tunes have worked their way on to compilations, not least because a large quantity of them are innovative pieces of work. They changed their name to High Broom in the spring of 1970 and split shortly afterwards.