If you have a shift or a day job cancelled, you should of course charge the full fee if you have turned down other work to fit it in.

It is reasonable to charge the full fee for days cancelled with less than a week's notice.

As always, our recommendation is to negotiate professionally. You had a contract to do work. If the original work the client had in mind is not there or is not ready on time, is there other work you could do for them? If not, what will they offer in fulfilment of the contract?

Several NUJ members have, however, requested a schedule of cancellation charges. See the link below to an experimental schedule.