HMS Fervent was a Fervent class destroyer which served with the Royal Navy. Two Fervent class destroyers served with the Royal Navy. HMS Fervent (1895 and HMS Zephyr (1895 were designed and built by Hanna Donald in The Royal Navy of the United Kingdom is the oldest of the British armed services (and is therefore known as the Senior Service) She proved slower than originally hoped and even when fitted with new water tube boilers could only make 26. 7 knots at her trials. She was accepted for service despite failing to make the 27 knot target. She served in home waters after belatedly leaving her builders, Hanna, Donald & Wilson, in 1901, six years after she was launched. Hanna Donald and Wilson were a Scottish engineering and Shipbuilding firm which flourished in the Victorian era.