Another illegal protest?

Yesterday there were protests outside Parliament during the debate on whether it should be a crime to “insult” religion (which the government lost by one vote, due to the absence of one Anthony Bliar…)

I wonder if the protesters got prior approval off the Met Police?

UPDATE: the BBC have a list of which way MPs voted. Depressingly (although not unexpected), my MP voted in favour of making it a crime, as did my ex-MP (Chester's one).