In 1822 a Tory government was formed which introduced some reforms. At that time you could be hanged for over 200 offences. (Although the sentence was often commuted to transportation). In 1825-1828 the death penalty was abolished for more than 180 crimes.
Peel also formed the first modern police force in London in 1829. The police were called 'bobbies' or 'peelers' after him.