The content blade requires the following to match for a UK driving license in a close proximity.
UK driving license pattern
Either words or phrases for a driving license (e.g. driving license) or personal identification (e.g. date of birth, address, telephone)
Driving license rule: 16 - 18 alphanumeric characters and begins with a letter.
Pattern:
LAAAADDDDDDLLDLLDD
Some digits are limited in the values accepted.