So I've got another question, namely what's everyone's opinion on "sneaking in" other documents, such as certificates, when the University only asks for transcripts? Can that be detrimental to one's chances of getting in or are they happy you include that, as well?

And i consider it helped me a lot!

I had passed the TOLES exam with a very good grade (Test of Legal English Skills) so I included it.

I was doing at the time another degree and had the transcripts so far and since my GPA was very high i included it as well,,,i wanted them to know i kept on studying after my law degree.

I also enclosed my Certified Public Translator license hehe i said to myself,,,why not?

you are trying to stand out from the crowd right? then if you feel you got something that might be an eye catcher then i dont see why you shouldnt include it! of course dont include like 10 extra docs,,i would say 5 tops!

hope this helped. Im at UCL now.