Well done, M le Maire. It's fairly well known, but I thought it might take longer than that. Nicko McBrain, via a circuitous route, had replaced Jeannot Hanela in the Trust line up, and, after they had toured together, McBrain joined Iron Maiden, while Maiden's stool tenant, Clive Burr, went to Trust.
McBrain frequently appears in the lists of top drummers of all time, and deservedly so, I think. He tightened up Trust's sound, and helped move them from their punky origins into the realms of (albeit very political) heavy metal, which was more fashionable than it had ever been at that point, with the NWOBHM on the rise.