I said 'leaders' ie important figures within the CP such as Corbyn's chief adviser Andrew Murray "After forty years in the Communist Party of Great Britain (CPGB) and then the Communist Party of Britain, he joined the Labour Party towards the end of 2016.[3][4] " “Britain’s Road to Socialism” – the 2011 revision of the Communist Party of Britain programme was written under his guidance. Read the links or check Wiki if you want to know about some of the others.
I’ve checked all and couldn’t find anything.