Why is Gordon looking so glum at his speech on Scotland to the LSE this evening?

Perhaps all these empty seats have something to do with it:

Tsk tsk, students. Some people would pay a lot of money to hear the Prime Mentalist speak…

UPDATE: Gordon has told the audience that he believes the bedroom ‘tax’ is “completely unacceptable”. If only he had some power as an MP to express his opinion – Gordon failed to turn up for the vote…