Those who suggest his arguments about guests not willing to travel outside London and the UK being tiny don't tally just don't get it.
Because
the UK is tiny, it makes having a central place where everyone meets easy. It's easy for everyone to get there, and while you're there you do other business. Having multiple centres is just silly.
The problem is that guests and their PR's have got out the habit of going outside London for interviews. They can do 5 in a day in London or get a taxi into Soho and do the whole country's radio stations down the line from one studio.
Years ago the likes of Pebble Mill, Open Air, Russell Harty, This Morning, The Tube, Ann & Nick had no problem getting people to appear on them. Now they don't have to as there's no regional production and no local radio.
Once everything's up in Salford and settled people with a book to flag will be quite happy to go up there for the day and do the North West media circuit: Breakfast, pop into Piccadilly or Smooth Radio, Richard Bacon in the afternoon, maybe a pre-record for Blue Peter too, and there's any other programme that develops up there. It won't even cross their mind as being odd in a few years