Travelling to UK twice in the last 2-3 months

Hey everyone, this is my first post in this forum and i'm eager to read all of your responses regarding my query. I have just finished school here at U of T, this summer I decided to travel by myself through various parts of europe, starting with London, UK. I've just again planned a trip, this time with a few friends to backpack through eastern Europe through the UK- Do any of you think I would encounter any problems at UK customs? I've got not no criminal record at all- but I was thinking this may raise concern if i return after a month or so.

Its not clear what you think the concern would be. Travel to Eastern Europe? Your not having a criminal record? John

i thought i made my concern evident, but to be concise and clear- i am just wondering if im going to have any problems at uk customs because im returning to the UK so quickly after leaving to come back to canada.

any input? anyone?

i think you'll be fine - as long as your stay in the uk is less than 6 months.