Josh Betts has sent me a link to an interesting website that, amongst other things, helps you track your MP's voting record on various issues.
Please be aware that someone has made a morale judgement as to whether an MP has voted in line with the Christain faith, so treat their assement with some caution. Never-the-less this can be a helpful site to get you started.
(If you dont know who your MP is, then find out who they are here)
If you know your MP's name, click here to see their voting record.