Forest’s great-grandfather, once a retainer of Cardinal Wolsey, acquired the manor of Morborne in Huntingdonshire at the Dissolution of the Monasteries.
Forest carried a bannerol at Salisbury’s funeral in 1612,
It was probably the Cecil connection that brought Forest into Parliament in 1624 at the election prompted by the decision of Sir Edward Howard II*, Salisbury’s brother-in-law, to plump for Calne, for which borough he had also been returned. Forest was presumably nominated by Viscount Wallingford (William Knollys†), high steward of the borough, who, like Salisbury, was married to one of Howard’s sisters.
Forest was named to 12 committees in the last Jacobean Parliament. The first, on 25 Mar., was for the bill to enfranchise Durham, and he subsequently attended one undated meeting of the committee. However, he did not attend any of the four recorded meetings of the committee to consider the bill to overturn a Chancery ruling against the London Feltmakers’ Company, to which he was appointed on 30 April. His legislative appointments included committees on ‘the new erecting’ of inns (1 Apr.), the catechising of children (14 Apr.) and the levying of a shilling a week fine on recusant wives (1 May).
Re-elected to the first Caroline Parliament, Forest was named to only three committees, all of them during the Westminster sitting. These concerned bills to prevent the use of Exchequer process to recover private debts (23 June), to restrain the grant of writs of habeas corpus, and to mitigate the sentence of excommunication (both on 27 June).
In 1626 Forest was returned a third time, and was named to 14 committees, including the committee for privileges (9 February). His presence on this committee perhaps helps to explain why he was also appointed to consider matters of an electoral nature, namely the bill to regulate elections (2 Mar.), the return of Sir Thomas Monck* (22 Mar.) and the conduct of the sheriff at the Leicestershire election (26 April). Among those appointed to attend the conference with the Lords of 7 Mar. on defence, Forest was also instructed to consider private bills, including one for a Huntingdonshire family (13 Mar.), and another concerning the 1st earl of Exeter (Thomas Cecil†) (24 May). He helped to draft a petition to be presented to the king ‘for the rectifying and augmenting his revenue’. He made two recorded speeches: on 3 May he successfully moved for the date of payment for the fourth proposed subsidy to be July 1627, and the following day he unsuccessfully opposed bringing in of witness who claimed to have see the duke of Buckingham adoring the Host in Spain, arguing that the man ‘might be a rogue, a renegade’. On 25 May he received a short leave of absence and may not have returned before the dissolution. There is no evidence that he sought re-election.
In September 1629 Forest, writing from Hatfield, reported to his ‘good brother’ Bevill that he had accompanied the 2nd earl of Suffolk (Theophilus Howard*), to Dover, where the earl had taken his oath. This was presumably a reference to the latter’s installation as lord warden of the Cinque Ports, to which office Suffolk had been appointed the year before.
