The law around ending a tenancy is relatively straightforward as long as the right timescales and procedures are followed, along with the use of the correct format of notice. It is recommended that you end your agreement properly if you want to leave. If you don't you may still be liable to pay rent, even after you've moved out. To do this, you have to give written notice to the landlord. You may not be able to end the agreement early if you have signed for a tenancy for a fixed period of time.