The development lesson is designed to aid progression from a small geared bike onto a larger geared bike ahead of full licence training; A1, A2 and A (also known as direct access). The session will be a minimum of 2 hours and is compulsory if you have little or no experience on bikes larger than 125cc. This would be booked prior to Module 1 training.
If you are not wanting to specifically progress onto licence training, this lesson could simply be an introduction onto a larger geared machine. It is not necessary to continue onto licence training following this session.
A development lesson can be booked directly following your CBT and it is not necessary to have completed your Theory Test prior to the session.