Does this change at the start for motorcycles include change of class?
Mmm, Yes - ish
You can change from A to B to C or any permutation therein.
You can change from D to A/B/C but NOT vice versa.
You can change from E to D/C/B/A but not vice versa.
If you change to E you would also have to change your name to Osborn or Walton, and the Deed Poll paperwork takes too long
You cannot change from A/B/C to O or vice versa.
You cannot change from A/B/C to R or vice versa.
You cannot change from Bike to Car or vice versa.