(b) a disclaimer
made in accordance with any law relating to bankruptcy in force before or
after the commencement of the Conveyancing (Amendment) Act 1972 , or not
required to be evidenced in writing,
(c) a surrender by operation of law, and
a surrender which may, by law, be effected without writing,
(d) a lease or
tenancy or other assurance not required by law to be made in writing,