HMS Iris II was a River Mersey ferry which was commandeered by the Royal Navy to take part in the Zeebrugge Raid of St George's Day 24 April 1918. Iris II along with another Mersey ferry, Daffodil, was towed across the English Channel to Zeebrugge by HMS Vindictive.
When the ship neared the Zeebrugge Mole she cast the two ferries aside. Iris II endeavoured to pull up to the mole under heavy fire in order to off-load the Royal Marines which were on board. the first attempt failed as the grapple-hooks were not large enough. Two naval officers, George Nicholson Bradford and Lieutenant Hawkins bravely climbed ashore and under heavy fire attempted to secure the ship. Both were killed and Bradford received a posthumous Victoria Cross. A Marine officer, Lieutenant William. E. Sillitoe[1][2] was in all probability killed in the same action, and is buried with another casualty, Private J. Bostock,[3] in the Hamilton Road Cemetery, Deal, Kent.
Iris II continued to sustain heavy fire and at one point a shell burst through the deck into an area where 56 marines were preparing to land. 49 were killed and the rest seriously injured.