Annesley was born in
Dublin,
Ireland, to
Francis Annesley, 1st Viscount Valentia, and his first wife Dorothy, daughter of
Sir John Philipps, Bt, of
Picton Castle. He was educated at
Magdalen College, Oxford, from which he graduated in 1634 as a
Bachelor of Arts; that year, he was admitted into
Lincoln's Inn. Having made the grand tour he returned to Ireland; and being employed by
Parliament on a mission to the
Duke of Ormonde, now reduced to the last extremities, he succeeded in concluding a treaty with him on 19 June 1647, thus securing the country from complete subjection to the rebels. In April 1647 he was returned for
Radnorshire to the
House of Commons. He supported the parliamentarians against the republican or army party, and may have been one of the members excluded in
Pride's Purge during 1648, though some sources claim he wasn't. As a moderate and a
presbyterian, he was highly sceptical of the army's decisions towards the end of the war. He did support
Oliver Cromwell however, though at this time Cromwell wasn't as powerful as he would later become as
Lord Protector, as the
New Model Army was under the command of
Lord Fairfax. His loyalty to Cromwell may have allowed him to retain his seat in parliament after the events of 1648. He sat in
Richard Cromwell's parliament as
Member of Parliament for
Dublin City, and endeavoured to take his seat in the restored
Rump Parliament of 1659. He was made President of the
Council of State in February 1660, and in the
Convention Parliament sat for
Carmarthen. The anarchy of the last months of
The Protectorate converted him to royalism, and he showed great activity in bringing about the
English Restoration. He used his influence in moderating measures of revenge and violence, and while sitting in judgement on the regicides was on the side of leniency. He was sworn of the
Privy Council on 1 June and in November he succeeded his father as
Viscount Valentia in the
Irish peerage. On 20 April 1661, he was created
Baron Annesley, of Newport Pagnell in
Buckinghamshire and
Earl of Anglesey in the
Peerage of England. Anglesey supported the king's administration in parliament, but opposed strongly the unjust measure which, on the abolition of the
Court of Wards and Liveries, placed the extra burden of taxation thus rendered necessary on the
Excise. His services in the administration of Ireland were especially valuable. He filled the office of
Vice-Treasurer from 1660 till 1667, served on the committee for carrying out the declaration for the settlement of Ireland and on the committee for Irish affairs, while later, in 1671 and 1672, he was a leading member of various commissions appointed to investigate the working of the
Acts of Settlement. In February 1661 he had obtained a
captaincy of horse, and in 1667 he exchanged his post of Vice-Treasurer of Ireland with Sir
George Carteret for that of
Treasurer of the Navy. He was elected as a Bailiff to the board of the
Bedford Level Corporation in 1664 and again in 1679, a position he then held until his death. ==Later years==