Background
Mansel was the son of Sir Lewis Mansel, 2nd Baronet of Margam and his third wife Lady Elizabeth Montau, daughter of Henry Montagu, 1st Earl of Manchester.
Mansel was the son of Sir Lewis Mansel, 2nd Baronet of Margam and his third wife Lady Elizabeth Montau, daughter of Henry Montagu, 1st Earl of Manchester.
He was re-elected Member of Parliament for Glamorgan in 1670 for the Cavalier Parliament and sat until 1679. In 1681 he was re-elected Member of Parliament for Glamorgan and held the seat until 1689. In 1688 he was appointed High Sheriff of Glamorgan.
Mansel was an influential person in South Wales.
The Duke of Beaufort, when Lord President of Wales, visited Margam during his "Progress" in 1684. Mansel died at the age of 69.
Mansel married Martha Carne, daughter of Edward Carne of Ewenny, Glamorgan.
Cavalier Parliament]
In 1660, Mansel was elected Member of Parliament for Glamorgan in the Convention Parliament.