This is more a matter though of the BBC failing to behave correctly. Again. Taking nearly two months to even look at a matter this serious is so far off the pace it is ridiculous.
The Sun will have some evidence, and say they presented some to the BBC. The BBC have shown over decades now that they just cannot be trusted to control itself, despite the whopping salaries paid to the huge battalions of managers, co- ordinators and protocol advisers.
They just want things to either stay under the carpet, or when they are swept out from under it, to go away. They learn nothing.
And as always, only so much of this story is out there.