 Ferrers had been a member of Parliament for several constituencies during the years 1542–1555, and in 1571 he was returned for St Albans.He is said to have supported the claim to the succession of Mary, Queen of Scots, and to have corresponded with her agent in England, John Lesley, Bishop of Ross.Ferrers died at Flamstead in Hertfordshire, and was buried there on 11 January 1579.