2. Find the same ones for your favourite news source.
3. Ask if the balance is reasonable for a British broadcaster, paid for by British people, to address stories of interest of British interest from a British perspective by applying those editorial guidelines.
4. Go and explore the times that the BBC has actively investigated and reported on exclusives critical of British foreign and domestic policy - there's more examples than you'd find at any other broadcaster in the World, I think.
If you'd like to point out examples of where the editorial guidelines are poor, or weren't applied in a particular scenario, or even an example of perceived bias that is entirely unbalanced, I'm happy to hear it. More often than not people complaining of bias are complaining that it reported something they disagreed with, but like I say, both the far left and the far right hate the BBC, anarchists hate it, authoritarians hate it - if they're annoying everyone apart from the more sensible majority that want to see all sides of a story, they're probably doing something very right.