The Pro Life Campaign is a non-denominational organisation which regards the right to life as the first and most basic human right of all. Without it, all other rights are meaningless.
You do not have to be from any particular faith tradition to agree that human life should be protected and that intentionally ending the life of another human being is not right.
Some of the world’s best-known self-professed atheists have also declared their support for the pro-life position, eg Christopher Hitchens.