PS Sandown was a passenger vessel built for the Southern Railway in 1934 and later served with distinction in the Royal Navy during the Second World War.

[1] The ship was built by William Denny and Brothers in Dumbarton and launched on 1 May 1934[2] by Mrs E.J.

Missenden, wife of the manager for the Southern Railway Company Docks at Southampton.

At the outbreak of the Second World War, she was requisitioned by the Admiralty and converted to a minesweeper with the pennant number J.20, initially serving with the 10th Flotilla in the English Channel as the senior officer's vessel.

On 27 May 1940, Sandown led the flotilla to the Dunkirk evacuation, returning with them on the following day and then operating independently.