All you have to do is watch the last 5 mins where they do the stupid Scooby Doo summary. Sheesh. What a waste of BBC funds. (It was on in the background before anyone makes the 'switch over then' comment).
Ardal was interviewed the other day on The One Show about it and he said it's so unbearably hot they have people actually giving them wet flannels and fanning them down between scenes