I can assure you 100% Joe B doesn't own it. He used it back in March for a gig after Harris contacted him.
Joe has seven early Les Paul Bursts now (having purchased another '60 about a month or so back).
Harris is the UK custodian of Peter's old guitar. As i understand it the guitar does have a new owner after Melvyn Franks sold it. Joe didn't ask who the owner was, he was just pleased to get a chance to play it.