The Telegraph don't let facts get in the way of a good story

Roughly, it's estimated that Doctor Who costs £770,000 an episode. So does the Telegraph really believe that the three-minute Radio One ad cost £700,000?

The advert is estimated to have cost up to £700,000 – for facilities, crew, animal hire, costumes, special effects and production time

Really? says who?

– according to advertising sources.

Oh. "Advertising sources". You should have asked a bloke down the pub, Telegraph. Blokes down the pub are great at estimating the costs of producing something that, by definition, they haven't seen.