Voting on whether to drop bombs on people should not be subject to a Party Whip, and there should be a free vote so that MPs can vote with their consciences. So it is commendable that some Conservative MPs are likely to not support the Government.
// There are thought to be at least 15 who will still not back the government. Some have questioned Cameron’s claim that there are 70,000 rebel ground troops ready to occupy territory held by Isis. The doubters include former army officer John Baron, former shadow home secretary David Davis, Sir Edward Leigh, former cabinet minister Peter Lilley, and Julian Lewis, the chairman of the Commons defence committee. //
Cameron has a working majority of just 16 so more abstentions than that means Cameron needs votes from other Parties for this to be passed.
The LibDems (all 8 of them) will support Cameron (old habits die hard), but it will probably be Labour MPs who decide which way or the other. As Labour Mps have a free vote, it is likely that about 60 will not vote against bombing, so Cameron will get a majority.