What is the starting rank in all British police forces?

The British bobbies, truly the world's first uniformed, paid and organized police force that started in London, England, as the London Metropolitan Police with it's headquarters at Scotland Yard, in 1829, all thanks to one, Sir Robert Peel, the British Home Secretary at the time and later, a great 19th Century era British Prime Minister with the Conservative Party, whose policing ideas later gave birth to many other internationally known police forces, as well as the American-made New York Police Department and other American police forces that were also formed in the United States in the 19th Century, first in Boston, then in New York City in 1844 during the American Presidency of John Tyler before branching out to other American large cities...