Not that its needed but I have yet more skepticism having now read the article:
The conversation was intercepted by RAF operators based at the National Air Traffic Services (NATS) Control Centre in Hampshire - I'm pretty sure Swannick (National Air Traffic Services (NATS) Control Centre in...
Commercial pilots talking over the radio to each other [presumably in flight] is as rare as hens teeth as they only ever speak to ATC.
If they were to do this [it is possible], they would know its not a 1 to 1 conversation and their conversations can be listened in to on any UHF radio set tuned...