Two ratings just managed to escape from the flooded rear compartments before the watertight doors were sealed. The seriously damaged submarine now lay with her aft end wedged in the mud unable to surface, despite frantic efforts from the crew. After nearly 24 hours submerged the whole crew were seriously affected by lack of oxygen and some were nearly comatose.
Frederick Gill and his wife Dorothy became the first civilian fatal casualties of the war in England, when a Heinkel bomber crash landed on their house, No. 25 Victoriia Road, Clacton. Moments later there was an enormous explosion. The plane had been circling over Clacton in Essex for about half an hour before it came down, and many people looking out of the windows were injured in the blast.