Humber class monitors

The Humber class monitors were originally ordered by Brazil to serve on their rivers but were taken over by the Royal Navy in 1914
HMS Humber was the name ship of the Humber class of monitors, a class of ships originally built for Brazil but taken over by the Royal Navy at the start of the First World War.
HMS Mersey was a Humber class monitor that served off the coast of Belgium and the east coast of Africa during the First World War.
HMS Severn was a Humber class monitor that also took part in fighting off the Belgian coast and the east coast of Africa during the First World War.