If the BBC do empty chair her, it'll be interesting to see whether they invite an audience sampled from the whole population's political leanings or just those of the parties taking part in the debate.
I don't think any Conservative supporters were invited to the last BBC 'leader of opposition' debate resulting in Farage having to argue his points to an audience of Labour, SNP, Plaid and Green voters.
I don't think any Conservative supporters were invited to the last BBC 'leader of opposition' debate resulting in Farage having to argue his points to an audience of Labour, SNP, Plaid and Green voters.