HMS Tireless (S88)
 HMS Tireless is a Trafalgar-class nuclear submarine of the Royal Navy and is the third vessel of her class. Tireless is the second submarine of the Royal Navy to bear this name. She was launched in March 1984 sponsored by Sue Squires wife of Admiral 'Tubby' Squires and commissioned in October 1985.Tireless had been scheduled to be decommissioned in 2013 however she is still in service as of April 2014. The intention is to replace her with one of the new Astute-class submarines.