The BBC's response seems to boil down to "we aim to reflect voices in the UK proportionally to current voting intention".
I don't think that should be their goal, though. I want them to aggressively hold anyone with, or who wants power, to account. Then, when complaints inevitably come from the right, they could justifiably say "our goal is to aggressively challenge everyone equally", and point to examples of them holding the other parties to account too.
I think Private Eye is an example of this done well - they look for corruption or hypocrisy, and wherever they can find it, they challenge it.
Was the BBC ever like that? - much more aggressive and towards anyone in power? - or am I just looking back with rose tinted glasses?
Is there anything the lib dems and greens do to get more of the dropping labour support? It's scary to me how little of that drop has gone to the left.