Mr Sirisena told BBC Sinhala's Saroj Pathirana that an investigative committee would work "efficiently, in a balanced, legal and impartial manner".
Hancock said: "Overall, the BBC does a good job in reporting accurate, balanced and impartial rural stories.
In response to Lewis' comments a BBC spokesperson said: "The BBC provides comprehensive coverage of Welsh rugby, delivering balanced and impartial output across the range of our services to help inform our audiences.
It told The Independent that the programmes it has made "have always been fair, balanced and impartial".
"We are satisfied that our coverage of the European Commission report was fair, balanced and impartial," the BBC spokesman said.
On the criticisms of Easton, the spokesperson said: "We are satisfied that our coverage of the European Commission report was fair, balanced and impartial.
After receiving a figurative flood of listener complaints regarding the Lawson interview, the BBC Radio 4 Today program defended its practice of false balance, claiming, "we are satisfied that both this segment and our overall coverage is fair, balanced, and impartial".
Although the news landscape is changing rapidly with exponential growth in the sources, styles, and types of news available, audiences appear more attached to the traditional norms of balanced and impartial news than some might suppose.
What a perfect example of "fair, balanced, and impartial" coverage!
The result would be a more embracing, more balanced, and ultimately more impartial bench of nine people.
"She wants to cooperate with a fair and impartial investigation.
