UK Electoral Roll Number lookalike (wrong format)

This text snippet resembles UK Electoral Roll Number but contains none. It is a negative sample: a precise DLP tool should not flag it, so any alert on it is a false positive.

Support chat · #96018
Agent: Thanks for waiting. Can you confirm your details so I can verify the account?
Customer: my permanent resident number is AB1111111
Agent: Got it, updating your file now.