Could everyone please read the legislation. Particuluarly Schedule 4.
Whopity has posted one of the most important elements.
The legislation also clearly covers issues such as "friends", "family" and "family friends".
The CAA is right to remind instructors of this issue because many instructors provide instruction which is designed for children and therefore when doing so will be carrying out a regulated activity.
For the other 90% of instructors, they will not be doing such courses andf any involvement with children will only be incidental to the main activity of teaching adults.
In terms of Vunerable Adults, I think it is safe to say that they will not be receiving flight instruction because in many cases they will not be able to gain a medical. So it is unlikely that this category will have any contact with the flight training industry.
FOK - you need to read the legislation (and so does your wife). Better still get a good solicitor to advise your wife!!.
Driving instructors spend most of their time teaching teenagers to obtain a licence that they can hold before they become adults - hence not having the required clearance would make it very hard to earn a living as such.
Finally, the CRB is only one method of being cleared under the system. Please read the legislation to see.