Andrew Deniszczyc, an A2 student from South Yorkshire studying Mathematics, Further Mathematics, Physics and Chemistry.
This site currently covers all of AS/A2 Chemistry and Physics. The syllabus they follow are:
During this academic year no further subjects or topics will be added.
As the content is what I have been learning myself, unfortunately I do not have the time to add topics from other syllabuses. However, much of the content will still be relevant to your specification.
Sorry, I cannot personally provide help with questions. Be sure to check out Student Room, which is a great place to get some help.