Poley’s ancestor Thomas Poley originally came from Cottered in Hertfordshire. The descendants of Thomas’ first marriage settled at Badley in Suffolk, and one of their number, also called Thomas, sat for Ipswich in 1554. However, Poley himself was descended from Thomas’ second marriage, to the heiress of Boxted manor, which property was situated eight miles from Sudbury in west Suffolk.
Poley was a younger son, but inherited the family estate in 1594 on the death of his elder brother Sir John, who served under Peregrine, 13th Baron Willoughby in the Low Countries on a mission to the Count of Oldenburg. Sir John died ‘£5,000 in debt for good wine, beer, and cheer’, as Willoughby was informed.
In 1616 Poley’s daughter, described by Chamberlain as ‘a dainty, fine young lady’, married (Sir) Humphrey May* and the letter-writer thought that her charms were ‘no hindrance to her husband’ in his appointment as chancellor of the duchy of Lancaster a couple of years later.
Poley was again returned for Preston in 1624, but chose instead to sit for Sudbury, where he may also have been nominated by May. The latter had apparently failed in his attempt to influence the 1621 election at Sudbury and perhaps hoped that by sponsoring a local candidate like Poley he could re-establish his right to make nominations without controversy. It is therefore difficult to be sure whether Poley was returned on his own influence or that of the Duchy, particularly as the borough’s other significant patron, Sir Robert Crane*, had been brought up by Poley’s father-in-law, Sir Robert Jermyn. Poley made no recorded speeches in the fourth Jacobean Parliament, but was named to the committee for privileges (23 Feb.) and those for bills to naturalize the Scottish ecclesiastic, Dr. Balcanquhall (4 May), and to sell the estates of Toby Palavicino and the 1st earl of Middlesex (Sir Lionel Cranfield*) for their creditors’ benefit (both on 19 May).
There is no evidence that Poley sought re-election in 1625. In the aftermath of the first Caroline Parliament he was appointed joint collector of the Privy Seal loan in Suffolk, for which he received his ‘full allowance’, unlike his colleague Sir Henry Glemham.
Poley was again elected at Sudbury in 1628, when he was named to seven committees, including those to report on the presentment of recusant officeholders by the Commons (24 Apr.), to consider the bill for the liberties of Parliament (28 Apr.), and to examine the complaints against the deputy lieutenants of Cornwall (9 May). He was again an advocate of a vote for generous supply, advocating five subsidies on 4 Apr., and on 19 May he pointed out that the last Parliament would not have agreed to a large grant had it not been convinced of the king’s necessities.
