This is the fifth fully revised edition of a book first published in 1970\. This longevity is testimony to its enduring value as a reference work - indeed, 'Colledge' (as it is universally known) is still the first stop for anyone wanting more information on any British warship from the fifteenth century to the present day when only the name is known. Each entry gives concise details of dimensions, armament and service dates, and its alphabetical and chronological arrangement makes it easy to track down the right ship (otherwise the Royal Navy's tradition of re-using the same names can be misleading). This new 5th edition contains some 200 new entries and revisions to many older entries. These reflect the demise of the post-Cold War ships as the Royal Navy was shrunk down as part of the peace dividend, and successive defence reviews saw the loss of significant ships classes such as the Type 42 destroyers, Type 22 frigates and the _Illustrious_ class carriers. It is now being re-equipped in the face of new global challenges and has seen the introduction of the _Queen Elizabeth_ class carriers, the largest ships ever built for the RN; the Type 45 destroyers; and Type 26 frigates and new patrol ships which will take on more global policing roles. Submarines should not be forgotten and the Cold War S class and T class are being replaced by the _Astute_ class submarines, and the deterrent role, presently undertaken by the _Vanguard_ class, is to be carried forward by the _Dreadnought_ class submarines. Also included are the new RFAs which are increasingly taking on frontline operations to release the small number of escorts to more combative roles. In addition, there are updates to the Royal Australian, Canadian and New Zealand navies which have programmes to introduce new destroyers, Arctic patrol vessels, submarines and support ships. Since the death of Jim Colledge, who was widely respected for his pioneering research on the technical details of warships, his _magnum opus_ has been updated, corrected and expanded with similar enthusiasm and attention to detail by Ben Warlow, a retired naval officer and author of a number of books in the field. Some press comments: "A unique reference book which is the automatic starting point of research on Royal Navy ships." - _Lloyd's List_ "This quite invaluable reference tool ... " - _The Mariner's Mirror_ "The book is absolutely essential in every naval historian's library." - _Warship World_