I agree with where one sits in the stands is a factor, but I would say that the BBC managers running the schedules and some of the presenters, especially on radio, had the 'liberal elite bias'.
Looking back I remember that during Labour's 13-years, Conservatives appearing on the TV political shows were (rightly or not) treated like something that came in on the bottom of someones shoes - in fact as someone who loves political debate, I refused to watch the Andrew Marr show and Question Time for years.
And based on the facts/apologies, some BBC executives have since admitted stifling debate on key government policy/issues during that time e.g. immigration.
www.dailymail.co.uk/news/article-2354713/BBC-chief-admits-We-deep-liberal-bias-migrants--changed.html
Now I at least watch Andrew Marr as I think he (and Andrew Neil, not co host Jo) sticks it to all politicians, but whether more willing or not, I find more opposition MPs being given air time over the past 5-years, than the previous 13-years e.g. UKIP who were taking 2-3 times more Conservative voters, asked with a 2010 "drivel" manifesto to comment on non EU issues.
One recent story intrigues me as reported by Nick robertson, when Ed Miliband was meeting "BBC Executives" and TELLING THEM he was 'going to weaponize the NHS'; why was he meeting them, why would he disclose to them his/Labour's controversial strategy?
Finally as possibly relevant to us all funding the BBC;
www.thecommentator.com/article/1953/exclusive_bbc_left_wing_political_bias_illustrated_through_uk_political_funding_revelations