Career
He regained the seat in January 1910 and resigned in March 1912. He was made a Baronet on 20 June 1898, of Bryngwyn (Bryngwyn Manor, near Wormelow Tump), Herefordshire. He was a senior partner of the family timber and shipbuilding company, Pollok, Gilmour and Company.
The Rankin Constitutional Club, in Corn Square, Leominster, is named after him.
His Baronetcy was created in 1898. He earned a first-class degree in the Natural Science Tripos at Trinity College, Cambridge.