Presently, the only thing that is "happening" is that BBC is indulging in their usual annual pre-series publicity stunts for this programme, with stuff appearing in the tabloids, not discovered by "investigative journalism" but I'd guess, by deliberate leaks.
The BBC aren't daft, I guess everything is already cut and dried and if it isn't, they'll say it was anyway.
They are known to be very economical with the truth.