Knatchbull was
High Sheriff of Kent in 1785. He entered the
British House of Commons in 1790, sitting for
Kent until 1802. He was listed 'friendly' to the abolition of the slave trade and on 27 April 1792 he proposed that the abolition of the slave trade, which he supported, should nevertheless be deferred until 1796 and carried his point by 151 votes to 132. The 1792 Slave Trade Bill passed the House of Commons mangled and mutilated by the modifications and amendments of
Pitt, it lay for years, in the House of Lords. Biographer
William Hague considers the unfinished abolition of the slave trade to be Pitt's greatest failure. It was this gutting of
Dundas's plan that caused the Slave Trade Bill to fail. By rejecting the incremental approach in Dundas's 12-point plan, the abolitionists lost their opportunity to win support in the House of Lords. ==Family==