BBC is biased towards the status quo. Very, very broadly it's position is economic-right social-left, which is pretty much Official Government Worldview, whatever the government, these days.
Yes, although there are a lot of diversions from that, for instance Farage and UKIP (who are anti establishment social conservatives) got substantially more coverage than was reflected in their polling. There are a lot of social conservative voices given a lot of coverage, and in positions of power (within a British context, more defense of the British Empire, Euroscepticism and than evangelical Christianity) like Paxman, Andrew Neil, Humphreys, Melanie Philips etc.
Also, I'd say their economics coverage is reactive, it's framed around the Budget, major speeches from prominent politicians, research or press releases from the OBR, IFS, the IMF or similar organizations. It reports those positions, then goes to opposition parties or other figures to ask for comment. The problem for left wing parties is that doesn't give much space to get across a completely different narrative, but that is frankly not the BBC's role.
Also, I'd say their economics coverage is reactive, it's framed around the Budget, major speeches from prominent politicians, research or press releases from the OBR, IFS, the IMF or similar organizations. It reports those positions, then goes to opposition parties or other figures to ask for comment. The problem for left wing parties is that doesn't give much space to get across a completely different narrative, but that is frankly not the BBC's role.