Universities are not lying when they say that they aren't too bothered by which subjects you studied for A-level, as long as they are academic ones. I know people who have studied three sciences and are doing exceptionally well in their law degrees.
History, Spanish and English are all strong traditional subjects, respected by universities for law. Religious Studies and Psychology perhaps a little less so, although given that your other three subjects are very academic ones, neither would be a problem.
But, if you are inclined to take science subjects, or one of them (I studied Maths as one of my A-levels), then do so and don't be worried that universities will look down on it.