A sub-letting takes place when a tenant
grants a new lease for their property, or part thereof,
to an alternative occupier, for a period less than the
residue of the tenant's lease.
The period of the sub-letting must
be at least one day less than the unexpired period of
the superior lease.
If a tenant attempts to sub let the
property for a period equal to, or more than, the unexpired
period of their own lease; this operates as an assignment
of the term and not as a sub-letting.