Subletting occurs when a tenant permits another party to lease the rental property that the tenant has leased from the landlord. The tenant then assumes the position of landlord (known as the head tenant) in relation to his or her subtenant. Subletting usually occurs because the tenant has signed a fixed-term lease and wants, for whatever reason, to get out of the lease before it expires. Subletting can only take place with the consent of the landlord.
Where a landlord refuses the tenant the option of subletting, the tenant can serve a notice of termination to end the tenancy if they so wish.