In conformity with the pattern common among Northampton’s burgesses, Hayrofe was elected as bailiff and then to Parliament in quick succession when still young. For long thereafter he remained one of the town’s most important men. In 1465 he joined with three other leading townsmen, including Thomas Hunt* and Thomas Braunfeld*, in advancing the sum of 200 marks to (Sir) Thomas Tresham* (who was repurchasing his estates after suffering attainder in 1461), taking as security a lease of Tresham’s property in Northampton for a term of five years. On 1 Apr. 1472 he attended a meeting of the fraternity of ‘the Holy Rode in the Walle’ in the church of St. Gregory the Pope.
By this latter date Hayrofe had greatly increased his resources by a marriage, probably his second, to the widow of a very wealthy merchant of Stratford-upon-Avon. In his will made in April 1473, her husband John Hannys had left as much as 460 marks to his four children and he treated his widow with similar largesse. She was bequeathed as many as 1,500 sheep with a moiety of all his jewels and given a life interest in property in Stratford-upon-Avon worth 10 marks p.a.
