Re: Strangely the BBC does nothing to encourage right-wing comedians.
The problem isn't a lack of right wing comedians, it's a lack of comedians that don't make a constant stream of jabs at the right and make their leftness part of their act.
None of the top stand-ups do it, A: because why piss off half your audience, B: they are funnier than cheap anti-conservative jokes.
The second rate comedians the BBC has on spend their time making cheap, lazy and unfunny jokes. See Russel Howard as a "fine" example of that.
Most watchers of BBC panel shows are presumably either apolitical or left wing, perpetuating the view that it's acceptable for BBC panel shows to be firmly left wing.