Memorials to 1939 submarine disaster
The 75th anniversary of the sinking of a submarine with the loss of 99 lives has been marked.
On Sunday wreaths were dropped into the sea off Llandudno to remember the Royal Navy's worst peacetime tragedy in 1939 involving the HMS Thetis.
A memorial was also unveiled in Birkenhead with the names of all those who died.
An accident happened during sea trials for the new vessel which had sailed from Wirral.
Christopher Dearden looks back at the disaster.
02 Jun 2014