On the morning of 16 June 1955, Sidon was moored alongside the depot ship HMS Maidstone in Portland Harbour.

On 1 November 1955 Rhodes was posthumously awarded the Albert Medal for putting his life in danger to save others.

The bodies of the 13 casualties were removed and buried with full honours in the Portland Royal Naval Cemetery overlooking the harbour.

A torpedo being readied for the morning test shot had begun a "hot-run" - its engine had started while it was still inside the submarine and was over-speeding, creating very high pressures in its fuel system.

When an oxidizer line burst, HTP sprayed onto the copper fittings inside the torpedo, decomposing into oxygen and steam.

[4][5] On the 50th anniversary of the Sidon accident, 16 June 2005, the Dorset Branch of the Submariners Association erected a Memorial Stone to those who died.