C.F.A (Construction Fixings Association) https://www.the-cfa.co.uk/
BS 8539 https://www.the-cfa.co.uk/publications-and-downloads/cfa-8539-forms/
Scaffolding Association http://www.scaffolding-association.org/
Scaffolding Association Member List http://www.scaffolding-association.org/members/members-a-z