The Alington family had held lands in Hertfordshire and Cambridgeshire since the fourteenth century, and several members sat in Parliament for Cambridgeshire, including two Speakers of the House of Commons.
Alington succeeded as 3rd Baron Alington of Killard, on 20 Mar. 1660, following the death of his brother Giles (1633-60). The construction of a grand house at Horseheath in 1663-4, designed by Sir Roger Pratt and described by Evelyn as ‘seated in a park, with sweet prospect and stately avenue’, cost around £20,000 and left Alington in debt for the rest of his life.
Alington was elected to Parliament for Cambridge in 1664, replacing his stepfather, Compton. His second wife having died in childbirth, Alington began to court his third wife, a daughter of the earl of Bedford, it being noted in April 1673 that ‘Lady Diana Verney will not yet have Lord Alington’.
In debt and reliant on government handouts, Alington’s consistent support for the court throughout the Popish Plot and Exclusion Crisis received its reward in his appointment as constable of the Tower and lord lieutenant of Cambridgeshire. In March 1679 it was rumoured that he would be part of the treasury commission which succeeded Danby.
