I've often thought the best way to protect the BBC is to refund a month's licence free to everyone, but simultaneously take all BBC services off air / offline for a month. People don't realise how good they've got it
I used to look at the complaints logs for the BBC and I can tell you that there were just as many complaints about right-wing bias as left-wing bias, pro-Palestine, pro-Israel, pro-Europe, anti-Europe etc.
I consider that a sign that they mostly get it right.