I see The Bert trying to cast himself as an International Man of Mystery.
The truth is that he knows that he can no longer rely on the fawning adulation he used to receive in Fagan's, The Goose Tavern and other haunts so he takes himself away to pastures new where he can try to put the world to rights. Oh it's all very hush hush you know: I have put a lot of work and a lot of travel into it and a lot of it has to be confidential by its nature,” he said.
A bit like the sort of celebrity who says; "I do a lot of work for charity - but I don't want to talk about it"
He probably fancies himself as a cross between an SAS operative and the Milk Tray Man.