I've found Professor Gloomy's increasingly self-importance, media-attention-seeking etc, AND his lack of willingness to share code openly very annoying throughout this epidemic. Whether his resignation will prove to be in the country's interest or not, I can't say, but on another grim day I have to say that this story gave me a flicker of Schadenfreude.
In terms of timing... do other people think that Telegraph investigated and set up this story for political reasons? They've been trying to get Boris to end the lockdown for weeks.