20(1)Nothing in Part III of this Act shall affect the validity of anything done by, or in relation to, the Postmaster General before the appointed day under or by virtue of the [1950 c. 39.] Public Utilities Street Works Act 1950; and anything which, immediately before that day, is in process of being done under, or by virtue of, that Act by or in relation to him (including, in particular, any legal proceedings to which he is a party) may be continued by, or in relation to, the Post Office.
(2)Any notice or direction given or other thing whatsoever done under the said Act of 1950 by the Postmaster General shall, if effective at the appointed day, continue in force and have effect as if similarly given or done by the Post Office.