There was no single poet laureate from 1930 to 1967. The position of Poet Laureate of the United Kingdom is held by a single person at a time, and they are appointed by the monarch.
Here are the poets laureate during that period:
* 1930-1949: John Masefield
* 1950-1967: Cecil Day-Lewis
It's worth noting that the position was vacant for a short time between Masefield's death and the appointment of Day-Lewis.