kircubbin2000
Family member involved in it. I've just discovered it was filmed in the summer and they had to sign a non disclose order to keep the winner a secret.
As there are about 200 crew involved, plus the contestants, that must be quite a challenge. I guess the crew realise their jobs are at risk if the name of the winner gets out. It will ruin the whole series and cost the BBC thousands.
It must be difficult for the contestants when they return to their families, who will be gasping to know whether they won! None of them can say a word to anyone, so presumably the money doesn't get released to the winner until now.