You need to provide a concrete example. I agree with you and one concrete example was the BBC coverage of the 2014 Scottish independence referendum was cringeworthy in its level of intense propagandistic sophistic bias. London told them what to write, and they rolled and wrote what they were told, to the letter. For a news outlet with an otherwise excellent reputation it was truly awful. Possibly they did such a juvenile job of political propaganda spreading as a form of civil disobedience, which would be kind of brave of them.
The BBC is more like a collection of fiefdoms than a single entity with a well-defined editorial policy. So it's not good at being consistent.
But as a rule it's pro-Establishment - sometimes smarmily so - with occasional progressive breakouts.
Generally the media in the UK are terrible, with a definite right-wing slant, even from supposedly left-leaning dailies like The Guardian = which practically exploded with rage and 'What's wrong with all you peasants?" indignation when Corbyn was elected to lead the Labour party.
Unfortunately racism and hate have a big audience. The Murdoch papers and The Mail would have no influence if people decided they were trash and stopped buying them. But no one ever went bust pandering to lowest-common-denominator smear-and-fear journalism.