As above, no UK Uni requires more that 3 A levels - and taking 4 does not get you any extra credit, so its essentially pointless.
The only exception is taking Maths and FM if you are aiming at a maths-heavy STEM degree or Economics, otherise pick just 3 subjects.
Remember, AAA will always look better than ABBB - and those grades could cost you a Uni place. it simply isnt worth the risk.