YANBU.
You cannot choose to take a job that has elements you disagree with and then refuse to do them because of your religion or personal beliefs. It is like being a vegetarian, applying to work as a waiter and then refusing to serve meat as it is against your beliefs. If it is against your beliefs get another job.
Should nurses be able to refuse to give blood transfusion as they are jehovahs witnesses and it is against their beliefs - would you think it was right for a JW to apply to work in A&E and then refuse people blood transfusions and sue for compensation if she is made to give them?
Is it Ok for doctors and nurses to refuse to treat gay people for sexual related health issues (and I know catholic medical students and doctors that have told me they have no intention of treating homosexuals - no idea how they manage to get away with that as it is currently illegal, but there you go).
This is the thin end of the wedge, and the longer the UK is allowed to refuse treatment for people on the basis of their religious or personal beliefs the more and more people will be discriminated against - women are the targets so far, but it could end up being homosexuals, people of different religions, interracial couples (imagine if an IVF doctor was allowed to refuse to help an interacial couple have children as interacial marriages were against her beliefs), and anyone who does not share the same beliefs, such as car crash victims needing a blood transfusion. There are a lot of religions in the world (and a judge recently said personal beliefs could be equated to religion), it is not hard to find one that will fit in with your particular beliefs.
In denmark a doctor refused to refer a patient for a termination and told her to go to another doctor, she ended up on the national news being questioned about it, and caused outrage, Britain needs to buck up her ideas and treat medical staff picking and choosing who they treat in the same way.