Here's one for you. My MP is Roman Catholic - for the most part this is not an issue since he actually agrees on many secular values and describes himself as being on the "liberal side" of his faith.
I'm not sure that's really possible since religion is typically intransigent in such matters, but let's put that aside for now.
Outgoing MP Anne Widdicome, now Roman Catholic I believe, was also a strong god-botherer and many sitting MPs are of the same persuasion; our current PM being one of them. Widdicome demonstrated on TV before leaving the "house" that if she disagreed (personally) with anything a constituent(S) said she would vote it down.
This is democracy, apparently?
There are a lot of people of faith out there - but here's a question for everyone - how do we bypass a system which is biased against us: in some cases that bias is hidden behind closed doors.