Comedy Steve
We're f'ing brilliant
I think he's only threatening to resign as a minister not an MP. He won't do it anyway - he just likes publicity.
Spot on.
Whines about principals - says he might have to resign his ministerial position. Gets some press.
Then suddenly realises it's being important he wants, and that there aren't enough disgruntled Lewesians to unseat him...
... and does this : BBC News - Tuition fees: How Liberal Democrat MPs voted
Poignantly, look for number 2.