I can clarify this for you.
No you dont need the post code or the BSAU number on the bottom of the number plate.....but you will soon. However it will need to be a standard size number plate(depending on how the tester is feelin i guess)
VOSAthe people who run the MoT scheme for the goverment did introduce testing standards for bike number plates to fall in line with the car mot, however the mot testing guide is a manual based on road traffic legislation and standards....
They did fully introduce the number plate checks and tehn a week later had to withdraw them as someon in there legal department pointed out that there is no requirment on a bike to have the post code and bsau number, also a few other things like the back ground and coulour of the plate.
This is due to the road traffic act being so out of date woth regards to bikes its a waste of time....
So in short just a legal size plate will do
