Many thanks, always great to get some reassurance!

Many thanks, im only an novice to the forum.

My assured shorthold tenancy was entered into on the 5th July 2012 and I was of the opinion that this automatically expires on the 5th July 2013and therefore there is no need to provide notice to our landlord that we would be moving out on that date. We have found a new flat and intend to move in in early july, however when I phoned the rental agency he informed me that we need to give me 2 months notice? how can this be when there is nothing in the contract stating this and we have a section 21 letter from the landlord (sent to us when the contract was originally signed) stating that they will require possession on or before the 4th July 2013!