This would be Williams last performance with the band, and the first time that he met Lennon, who was drumming in the support act The Brain Children (Lennon's time in Parasite petered out due to the unworkable distance between him and Scanlon).
Williams' last concert with the band occurred, marking the initial encounter between Williams and Lennon, who was playing drums for The Brain Children. Lennon's involvement in Parasite came to an end because of the logistical difficulties caused by his separation from Scanlon.