The National Fraud Intelligence Bureau (NFIB) is warning the public to be vigilant of scam calls that appear to be coming from numbers similar to their own. Commonly, the first seven digits (07nnnnn) match the victim’s own number. The calls impersonate well-known government organisations, or law enforcement agencies, and will ask the recipient of the call to “press 1” in order to speak with an advisor, or police officer, about unpaid fines or police warrants.

https://www.actionfraud.police.uk/alert/warning-about-scam-calls-from-matching-mobile-phone-numbers