A very good effort, particularly for an A-Level project. Very well done!
With that said, there was obviously a number of serious problems and omissions with the sound. Quite a few sections of your short were in effect a silent film and most of the remaining sections were essentially a silent film with dialogue. However, your use of sound was very inconsistent, one part of a scene would have no sound (ambience, SFX or Foley), while the next or previous edit within the same scene/location would have one of these sound elements. It's obvious that you spent a considerable amount of time and effort recording and editing ADR but nowhere near the same attention to detail with Foley, ambiances, sound FX or in creating believable environments in general. This is definitely an area of your filmmaking which requires some serious attention if you are to progress to a higher level.
G