A more complete doco on Rory McEwen here: https://www.youtube.com/watch?v=bzCxPIc7MQw - includes some "Hullabaloo" footage, around 07:15 onwards - but the whole thing is worth a watch ("Secret Knowledge - In Search of Rory McEwen (2015)") - intro by Jools Holland (Rory's son-in-law...)