This is a serious question for the police (Midlands or Powys), has the law changed regarding farm vehicles displaying number plates? Very few, if any, seem to.
If I cross the Welsh border on my motorcycle I expect to be stopped by the police and have my exhaust pipes checked and the size of the number plate, very frustrating when a tractor goes by without plates at all and never getting stopped.
Are the police scared of upsetting farmers?
You cannot have one law for one and another for others.