The AIC is potential legal dynamite. Page 2 refers to the instructor not being satisfied with the standard of the flight and not signing the logbook. This is turning the Instructor into an Examiner with none of the training or licensing that goes with it.
Without a signature I wonder how many CFIs or whoever would be content to sign up the C of E. But the JAR only stipulates it has to be a flight with an instructor. No checking process mentioned. Another case of the CAA sticking its oar in and muddying the water for no real reason.
You wonder what will happen when someone who has been signed off by an instructor has a nasty incident sometime thereafter and tries to have legal recourse to the instructor for not picking him up on a causal fault. Or the insurance company gets their teeth into it..
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"Take-off is optional, Landing is mandatory"