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It was a wrong number.
Receiving a call marked as a wrong number suggests the caller dialled in error, rather than any malicious intent. Such instances are common and usually harmless, but it's wise to verify by not sharing personal details. Block the number if calls persist to safeguard privacy. Under UK data protection laws like GDPR, you're entitled to ask for removal from any lists, though here it seems accidental. Keep records of unusual calls and report to Action Fraud if patterns emerge indicating something more sinister.
It was a wrong number.