as an example
West Yorkshire
HSE (look at the table on page 26)
HSE link is for proposals dated 2002. The MSER is 2005, so presumably that supercedes these proposals?
The West Yorkshire link mentions Hazrd types 3 and 4 , which would cover 1.3G and 1.4G under the 5 KG rule, which would contradict the HSE link.
I'm not being pedantic, it's just that this does get confusing.