Foley was returned unopposed for Herefordshire in 1767, and again at the general election of 1768. From 1768 to 1772 he voted with Opposition, appearing in eight out of eleven division lists for that period. In the three divisions for which lists are extant, 1772-4, he did not vote; and Robinson in 1774 classed him as ‘hopeful’.
He did not stand for Herefordshire in 1774 but was returned for the family borough of Droitwich. On 22 Feb. 1775, on Wilkes’s renewal of the Middlesex question, and on 26 Oct. 1775, on the Address, he voted against the court. According to Walpole
Foley was a close friend of Charles James Fox, a gambler, and a racing man. Mrs. Delany wrote in 1773:
Lord Foley in his will authorized his trustees to pay a sum not exceeding £6000 per annum for the maintenance of his two eldest sons. The remainder of the income from the family estates was to be used for the payment of their debts. When these had been settled, the Witley estate (worth £11,500 a year) was to go to Thomas, and Stoke Edith (worth £3500 a year) to Edward. Thomas and Edward promoted a private bill to enable the estates to be sold for the payment of their debts. The judges who were ordered to report on the bill estimated that these amounted to £220,000, and under the terms of the will would be repaid in 27 years. In spite of intense lobbying by the two elder Foleys, the Lords rejected the bill.
Thomas Foley died 2 July 1793.
