Diadem-class cruiser
 The Diadem class cruiser was a class of First-Class protected cruiser built for the Royal Navy during the 1890s that served in the First World War. The class consisted of eight ships built at a cost of around £600000 each.They were considered good sea boats but criticised for their lack of a heavy calibre main armament bulky unprotected sides average speed and lack of manoeuvrability despite being considered large ships when completed.