He later represented Harwich and Essex in the House of Commons.

His son, the second Baronet, served as Speaker of the House of Commons and as Master of the Rolls.

His son, the third Baronet sat as Member of Parliament for St Albans.

[1] The Grimston Baronetcy, of Westbury in the County of Wiltshire, was created on 11 March 1952 for Robert Grimston, a grandson of the second Earl of Verulam.

He was later elevated to the peerage as Baron Grimston of Westbury.