Never seen one!
Shouldn't be given any notification! They'll just be a mad panic to get all the paperwork etc. up to date in those two weeks, then it'll all be forgotten about for the next 12 months or however long until the next 'audit'All locations/workplaces will receive an audit notification email at least 2 weeks before the audit takes place but, in some cases, a longer notice period will be given.
https://www.cwu.org/ltb/ltb-149-25-rmg- ... entatives/