Hudson - I think someone in your company has got a little bit confused! Extending flap in descent is NOT, as others have said, NECESSARILY using it as a speedbrake. Do your SOPs require a level off if ATC ask for a manoeuvre speed during your descent that requires flap extension? In the UK that would get ATC quite excited!
Most (UK) companies try to conform to the BAA/CAA requirements for CDAs and the false GP capture is guarded against with a check of altitude (height) against position (DME or NDB) as discussed here and at length on another thread.