Hello, I have received a Section 21 notice. My landlady has said via email that she has no intention of asking me to leave and making me homeless before I can move into the property I am buying, but that she has had to serve the notice in order for the agent to market the rental. The notice asks me to leave on a date in August 2013. The covering letter, signed by same person as the notice, says I'm required to vacate on a date in August 2014. Is this notice therefore valid? Is this perhaps her way of saying I don't actually have to leave until I'm ready? The agent has written and signed both the covering letter and notice. Or is it just another of the many mistakes the agent has made?