If you want to add a new registration to the database from the upload page, the system will accept two digits.
If, however an entry is first made using the search field on the front page, the system will tell you that at least three digits are required.
When entering N1 for example, press the space bar first and then enter N1 into the search field.
If the registration is not in the database, you are asked whether you wish to add the reg to the database, etc.
Malcolm.