HMS Princess Irene (pictured) exploded and sank off Sheerness, United Kingdom, with the loss of 352 lives.

HMS Princess Irene was a 5,394 GRT ocean liner which was built in 1914 by William Denny and Brothers Ltd, Dumbarton, Scotland for the Canadian Pacific Railway. She was requisitioned by the Royal Navy on completion and converted to an auxiliary minelayer. On 27 May 1915, she exploded and sank off Sheerness, Kent, while being loaded with mines prior to a deployment mission, with the loss of 352 lives.

Sheerness is a port town and civil parish beside the mouth of the River Medway on the north-west corner of the Isle of Sheppey in north Kent, England. With a population of 13,249, it is the second largest town on the island after the nearby town of Minster which has a population of 16,738.