You mention The Guardian Cailin, which under Katherine Viners editorship has gone from left to crazy and from being a paper I bought from the 1970s to 2010 has in my estimation dropped to the status of one of the ‘usual subjects’ when a fake news story propping up a government or corporate narrative is being promoted.
But a more significant shift in British media I think is the fact that the two remaining right of centre mass circulation daily papers, the Daily Mail — an atrocious, sensationalist rag, and the Daily Express, for a long time ‘the walking dead’ of British news media,(but I have a soft spot for the Express, my Dad was a staffer and finally a night editor for them in the 1960s & 70s) have recently shifted their positions, not exactly ‘to the right,’ but to being more in line with the official narrative.
The Mail, known for its rabid “The End Of Civilisation As We Know It” headlines over stories about something like dog poo on the streets, was never pro Brexit but was anti EU long before the referendim, is now edited by a former Guardian columnists and in a gobsmacking swith has been banging the drum for Theresa May’s sellout deal, while the Express, for decades staunchly anti — everything except The Queen (God bless her!) the nineteen fifties and free anti ageing drugs for Daily Express readers (they’re all about120 years old,) has been bought by Trinity Mirror group which owns left wing tabloid The Daily Mirror in a deal that should have been referred competition watchdogs.
We now have newspapers and their websites of left and right, but none that will challenge the government line on Brexit, war in the middle east (according to mainstream news we like it,) the idea that economies are enriched by uncontrolled immigration and the push towards globalism. This is in spite of the news industry losing sales and advertising revenue as potential readers reject the sameness and look for unusual stories and diversity of opinion.