In series 3, both Bryn and Gavin's cars have completely different registration numbers from the previous series. Gavin's blue Saxo has changed from a T-reg (MY 1999) to an X-reg (MY 2000). Bryn's green Picasso has changed from CV02 (MY 2002, registered in Cardiff) to HV54 (MY 2004, registered in Portsmouth). They are obviously different cars.