travel outside UK after submitting dissertation

[aquarius9]

Hi

I have Tier4 student visa now that lasts until Jan 2012. However, I already bought an Europe tour which starts on 8 Sep 2011 and return in the same month. That is, my travelling date is the date after I already submit my dissertation. What I worry now is whether I will have any problem when I re-entry to UK at the end of Sep. What documents should I prepare to support me when I re-entry ?. Also, I plan to return to my country on Dec after my congregation ceremony. Should I buy a return ticket and take it with me when I travel ?.

Thanks

[vinny]

Risky.