[1] He was born in Dursley, Gloucestershire, the son of William Vizard (died 1807), a solicitor there, and his wife, Ann Phelps.
He went to London in 1790 and worked for his articles under Thomas Lewis of Gray's Inn Square, an attorney of the Court of Exchequer.
He worked with Henry Brougham to have the Orders in Council (1807) repealed, on behalf of a group of merchants of Liverpool and Manchester, from 1807 to 1812.
[1] From around 1812, Vizard became active in Whig politics, initially as an unsuccessful candidate at Bristol in the 1812 general election.
[1] When George IV came to the throne in 1820, he attempted to impose "pain and penalties" on his wife Queen Caroline, by means of a bill in the House of Lords to dissolve their marriage.