At the end I asked him this: "I warn you now, this is the most difficult question you will be asked this week. If Nick Clegg and David Cameron are Brokeback Mountain, which film are you and your brother, Ed?"
He roared with laughter. I suggested 'Last Man Standing' which he thought was "very cruel". He then said "Let's hope it's not Two Brothers Into the Sunset".
Incidentally, we had a cracking programme last night, with interviews with Kitty Ussher, Philip Blond, Nigel Farage and David Miliband. Perhaps the highlight was the medical hour when a GP comes into the studio to dispense medical advice to listeners. The first caller related his problem with anal fissures. You've got to admire someone who's willing to go on the radio to talk about that. We also had a guy who kept fainting in his sleep. My first though was: how would he know?
I'm back on LBC at 7.15 until 10pm this evening!
UPDATE: I love this comment from a reader called Fat Councillor...
I think I am going to have to listen tonight. What other program offers David Miliband and anal fissures in the same programme?