He chose to use this opportunity to ask Davies a load of stupid fatuous questions of the "complete this sentence" or "spell this word" variety. For a minute or so, Davies hides his annoyance and gamely has a go at responding, but not surprisingly when he realises that 6Music are going to waste his time and this wonderful opportunity to actually ask some real questions, he bows out with some dignity by pretending the phone line is too bad for him to be able to hear what's going on. He would have been well within his rights to say "What the fuck are you doing? Do you have any idea who I am? You have five minutes to talk to one of the greatest songwriters of the 20th Century and this is how you choose to fill it - are you a cretin?" But he doesn't do that. He quietly takes his leave.
Another broadcaster might have felt embarrassed by this turn of events, possibly apologised, but surely had the decency to simply pretend that they hadn't been able to get Davies back, but Lamb, filled with self-importance, clearly thinking he has more talent than the writer of "Waterloo Sunset", decides instead to deride him. As if the whole debacle was Davies' fault. It is one of the most genuinely offensive pieces of radio I have ever heard and if the BBC had any fibre, the controller of the station should have called Lamb into his office the very minute the show was over and given him his P45. Instead he seems to be getting festooned with awards. Ah well. Perhaps he is right to be furious with someone for having the audacity to think that his dumb questions were a waste of time.
Remember kids, your license fee goes to pay Lamb's wages for being on the radio.