Shown here are all six Dover 305 mm (12 in) gunned monitors in line ahead, as seen from HMS Prince Rupert, they are from (keft to right) HMSs Sir John Moore, Prince Eugene, General Craufurd, General Wolfe and Lord Clive. The date and purpose of the operation are not known, but may have been in support of the Allied offensive in France in September 1916. Taken from Big Gun Monitors.