Lease: periodic tenancy: holding over
If a tenant whose lease has expired is allowed to continue in possession while negotiating a new lease, he is a tenant at will, until some other interest is granted to him. (Pang Kin Hang v Tsui Hung Restaurant Ltd)
Lease: periodic tenancy: sub-lease for a term greater than one period
A periodic tenant can grant a tenancy for a term that extends beyond a period of his tenancy but it will cease to have effect if the periodic tenancy is determined (Chan Sang v Choy Yuk)
Lease: variation: surrender and re-grant?
An agreement to increase the amount of the rent and the rental deposit did not lead automatically to the conclusion that there had been a surrender and re-grant. It is compatible with an intention to continue the existing lease on revised terms (West Coast International (Parking) Ltd v Secretary for Justice)
Lease: tenancy at will: termination
The assignment by the tenant at will of his interest to a third party is no determination of the tenancy, unless the lessor at will have notice. (Pinhorn v Souster)