Built by John Brown Shipbuilding in Clydebank Scotland, she was launched
21st December 1934. When originally laid down she was intended to be named H.M.S. Bittern
a Sloop of the "Bittern" Class, but was modified with additional accommodation and removal of her 2 X 4.7 inch guns to enable her to be used as an Admiralty Yacht. After running aground in the early part of WWII, she was 
repaired, and heavily modified with the fitment of 2 X Multiple Machine Guns, a vertical HF/DF mast, and a 12 pounder Ack Ack gun. She was also equipped with 2 X 20mm. Ack Ack guns on the wings of the bridge and 4 X 'Hedgehog' Anti Submarine spigot mortars, giving the Sloop Enchantress the Anti Aircraft/Anti Submarine capability of a much larger vessel.

In 1946 she was sold to the Three Star Shipping company and refitted as a passenger ferry. Heavily in debt due to the initial cost and refitting, the new owners desperately needed a good summer season ferrying passengers between Torquay and Guernsey, in order to manage the debt. Unfortunately a disastrous boiler failure saw her towed to Torquay to offload passengers, then to Southampton to pay off the crew, the owners going bankrupt.

Lady Enchantress was laid up and eventually taken to Dunston on Tyne, where she was scrapped in 1952.