Driving Training and Tests for Critical Workers

I have just received the above clarification from the DVSA regarding driving training for critical workers and the emergency provision of driving tests.  The NASP have provided some guidance to ADI's who wish to provide driving training for critical workers.  Part of which includes the following:

And yet, when a critical worker goes to book up a driving test using this emergency provision, they are informed that they must at that time be ready to take the driving test at short notice:

So ADI's appear to be in somewhat of a loop here.  They shouldn't start training a critical worker until they definitely know the critical worker will be allowed to book up an emergency driving test - and this should be demonstrated by the actual test booking.  And yet the DVSA are telling critical workers that before they book up a driving test using this emergency provision, they must be ready to take the test at short notice.