This animation gives an overview of the two rule changes from both a birds-eye and driver perspective.
Changes To Parallel Parking Marking Outline (April 2013)
The change in the wording clarifies, that the student has 4 movements to park the vehicle.
The first movement starts when they start reversing backwards into the car park.
The minimum number of 2 movements has been removed as this was also misleading (so there is now no minimum number of movements listed anymore).
Driving Test Tips and Advice
Learn from what other have done wrong and try not to repeat them.