As of 2010, the most dialed telephone number in the U.K. was 999. This emergency services number has been in operation since 1937 and is used to contact the police, fire department, or ambulance service in case of an emergency.

999 is a toll-free number that can be dialed from any phone in the U.K., including landlines and mobile phones. It is available 24 hours a day, 7 days a week, and is staffed by trained operators who can dispatch emergency services to the caller's location.

In addition to 999, the U.K. also has a non-emergency police number, 101, which can be used to report crimes that do not require an immediate response. This number was introduced in 2011 to help alleviate the strain on the emergency services and ensure that 999 remains available for true emergencies.

If you would like more information about the emergency services in the U.K. or how to contact them in case of an emergency, you can visit the official website of the U.K. government at https://www.gov.uk/emergency-services.

It is important to remember that 999 should only be used in genuine emergencies where someone's life is in danger or a crime is in progress. Misusing the emergency services number can tie up valuable resources and prevent those who truly need help from getting through.

In conclusion, as of 2010, the most dialed telephone number in the U.K. is 999. This emergency services number is available 24/7 and can be used to contact the police, fire department, or ambulance service in case of an emergency. For more information about the emergency services in the U.K., you can visit the official government website linked above.

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