When/ why/ how did this happen?
Please tell me it's only temporary - he ruins the dynamic between the two regular presenters, trips over his sentences, talks in a cliche TV presenting voice with undulating tones, has a manic, bulgy eyed, quite frankly disturbing way of addressing the camera and looks a bit like a giant when he's stalking around inside the houses (especially when he wears big coats)
Such an unnecessary addition to a good show, another example of the BBC losing the plot

This has ruined my day off