It's an ad for a training course not a job, so there is no need for anyone, including the DM, to get their knickers in a twist over it.
If anyone had bothered to read the reprint of the ad, they would have noticed that the last sentence of the Job Introduction bit says "You will be eligible to apply for future vacancies in the team."
It is just the BBC running a training course in the hope of spotting some talent for the future, something which other companies probably do as well (internships anyone ?).