Crash Barrier,
I believe one used to be able to instruct with just a PPL and an AFI rating, but not any more. The trouble with phoning the CAA is that you can get someone who isn't up to date with changes in the rules. Crazy, but what I've found too.
Now will the rest of you give the guy a break! He WANTS to instruct; the rest of you just want to use students to further your airline careers. Good for him. We need more dedicated instructors. You might have some reason to complain if there were a lot like him, but not many people will be able to afford to be. So quit bloody whining. The CFI at one of the airfields I fly at does it unpaid, and he's damned good, better than the ever-changing bunch of not-terribly-interested low hours airline wannabes who work with him.
Crash Barrier, if that's what you want, go for it. Unfortunately you will have to do the CPL ground exams, unless things change again. And yes, they are as bad as everyone tells you.
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Whirly
To fly is human, to hover, divine.