Two R.H. Green & Silley Weir mechanics using hydraulic chipping tools inside the boiler on board an unidentified ship. One man is wearing a plastic face shield and ear defenders but the other man is only wearing eye goggles. The location is not known but the company undertook work in the Port of London Docks and in Falmouth Docks. Transparencies numbers P63493CT to P63501CT were taken on the same occasion.