BBC is run in Scotland.The four politicians made five demands in an angry backlash at "editorial balance" going back to what they claim was bias in the independence referendum.A letter to the broadcaster and the UK Government was signed by Scotland's former justice secretary Kenny MacAskill and his Westminster colleagues Angus MacNeil, Douglas Chapman and Neale Hanvey.However, the letter, published in The National newspaper, quickly provoked a split in the party.