I think anyone listening to the interview does so with their own biases. He speaks well in the interview and comes across as polite and fairly well educated. On the surface he seems convincing; with his new found 'understanding' of Sheila's illness. However, like I said, we listen with bias and wearing guilty glasses I feel their are undertones of arrogance - especially at the end when Allinson asks what he will do if his submissions are rejected and, his voice changes when he states 'well then, we'll hit them with the other stuff' (or words to that effect). He almost makes it sound like a game.
Ignore the " polite and fairly well educated " bit, it's not what this is about. You're looking at it from a false point of view a very hollow way of going about it.
What he says is very precise without using emphasis ( inflection ) making no matter if the conversation was said in a broad Lancashire or Yorkshire or any other accent. He is speaking ordinarily and without signs of an actor in a Shakespearian play-------which I wouldn't have trusted, dramatizing everything.
He reduced his tone towards the end because his positivity took a hit,that's all----nothing sinister in that.
A bit like when you think you have 4 numbers on the Lotto and it turns out to be 3. Human nature ?
Like it's human nature to feel for someone's downfall-------called empathy.