Re newing my tenancy URGENT
I've just finished a 12 month assured shorthold tenancy..
It ran out on the 19th February 2011.
They wrote me a letter asking if I was going to renew it and to sign below to which I did an sent it back .
In the last 2 weeks I have had a serious personal problem arise which means I need to vacate the property asap but I also received my new tenancy agreement today but its not signed an I haven't signed it either. Does this mean I'm tied to staying there or can I leave ?
Also if I can leave do I need to give them notice ?