Under the Pneumoconiosis etc. (Workers' Compensation) Act 1979 (c. 41) (“the Act”) lump sum payments may be made to certain persons disabled by a disease to which the Act applies, or to dependants of persons who were so disabled before they died. The diseases to which the Act applies are pneumoconiosis, byssinosis, diffuse mesothelioma, primary carcinoma of the lung (where accompanied by asbestosis or diffuse pleural thickening) and diffuse pleural thickening.