From the BBC

"A few additional comments from Downing Street now, as the prime minister's official spokesman has been taking questions from reporters.

"Additional facts" over the weekend have led to the ethics investigation into Nadhim Zahawi's tax affairs

Rishi Sunak is previously not understood to have known that Zahawi had paid a penalty to HMRC

The investigation will be completed "as quickly as possible"

Sir Laurie Magnus, who will lead the investigation, will focus on ministerial declarations and whether these breached the ministerial code

But, it could extend to whether Zahawi's tax arrangements were appropriate"

++

So it would seem that either Zahawi:

Did not not fully inform Sunak of all the facts

Or

Sunak is already trying to distance himself from this latest mess.

The Tories could do with a better PR department or just getting their members to be more honest with each other. It might be quite a while before we can expect all of them to be honest with the general public.