Mushroom25,
The Mail has supported the Conservatives in every General Election since the war, even 1997 when the Sun and Times deserted them. Its Conservative bias is well documented. The DMG's primary function is to make money. It produces news products. Most of those are aimed at Conservative supporting members of the public who purchase its newspapers, or view its website. It keeps its readship loyal by feeding them stories they want to read. And the Daily Mail is a direct competitor to the BBC in the news marketplace, so any curtailing of the BBC's activities will potentially be a financial boost for DMG, so their views on the matter will be tainted anyway.
Obversely, a newspaper such as the Daily Mirror is courting a different readership, and it delivers news that is vastly different than the Mail. But both are heavily biased, and neither is at all impartial.
The BBC is supposed to be impartial. But that is a very difficult thing to deliver. Impartiality is quite subjective. It depends on the person that is Judging the BBC to be impartial too, and nobody is.