Which destroyers used the Royal Navy's 5.5-inch gun?
Short answerThe reply points to Hood and cruiser or secondary installations and says destroyer use was considered, without naming an operational destroyer example.
NotesThe follow-up asks which destroyer carried the 5.5-inch gun mentioned in the list of calibres. The examples named are Hood and other secondary or cruiser installations; no destroyer in service is identified. The calibre was considered for destroyers. The stated attraction was being near the upper weight the Royal Navy's operating methods could accommodate.