Note to those seeking to shift debate through changing language: the time to try to replace a term is not after your own government has sponsored legislation using and defining that term.
Exclusivity terms unenforceable in zero hours contracts
(1) In this section “zero hours contract” means a contract of employment or other worker’s contract under which—
(a) the undertaking to do or perform work or services is an undertaking to do so conditionally on the employer making work or services available to the worker, and
(b) there is no certainty that any such work or services will be made available to the worker.