starting Alevels at 19 !

i completed gcses in 2022 and attained all grade 8s. i then decided to take a gap year after gcses to go travelling! one year turned quickly into three years. i now want to settle down and do alevels maths, further maths and chemistry. my question is, does anyone know any colleges that will accept me or have been in the same boat as me? i’m not sure what i want to pursue at university yet, but i know doing alevels will open a lot of doors for me. i’m not interested in an access course or a btec. if anyone knows any colleges in london, please let me know!!