brought revised types of all chapters 1-40.

up-to-date leaflet 35: radio frequency radiations revised for October 2020.

up-to-date half 2.

added up-to-date leaflet 6.

up to date Leaflet 14: investigation and reporting of peculiar radiation routine (Nov 2013).

brought up to date leaflets 12 and 32.

delivered new version of leaflets eleven and 12.

replaced leaflets 1,3 and 8 with up-to-date types.

brought updated leaflet 14 Accident reporting.

introduced up-to-date leaflets 2, four, 16 to 18, 22 to twenty-eight, 30, 34 and 35, 37 to 40.

First posted.