The recomendation is that you should have authorised a cross section of exercises from the syllabus which may include Navigation, General Handling and Circuits.
The Instructor Form 2 must be signed by a FI(A) nominated to the CAA as part of the Registration (AIC 30/99). Once complete, there are no other requirements.
If the CFI wants to fly with you, its his perogative! The "Law" does not require it.