Obsolete standards formerly approved under the Carriage of Dangerous Goods (Classification, Packaging and Labelling) and Use of Transportable Pressure Receptacles Regulations 1996 (CDGCPL2 Regulations as amended)https://www.hse.gov.uk/cdg/stdobso.htm
Approved Design Standards and Specifications (March 2005)https://www.hse.gov.uk/cdg/stdcurr.htm