Fire up the universities you want to apply to with the follow - your a level subjects - your gcse results And ask if you are accepted into their architecture course.
Many top Architecture courses require Maths and/or Physics. Check carefully.
It's just Bath and Strathclyde last I was aware. Most don't require or prefer either. Cardiff, UCL, Cambridge all have no preference to my knowledge for example. Manchester say a mix is preferable but not required.