https://www.property-care.org/training-qualifications/
Most property surveyors pass work onto to people registered to the PCA.
I did the kingfisher course, its only a one day thing and it doesnt really teach you alot but you get approved contractor status which allows you to issue guarantees. Soverign do the same kind of training not sure about dry zone or other manufacturers
Damp proofing is all about diagnosis which you only get with experience from others.
I get work from surveyors but im not PCA registered and i know plenty people who are with the PCA and know f**k all...........lol.
Its abit of a grey area tbh................@Irishspread is the dampproofing poster boy, he's abit trigger happy with the injection cream though...................
Hope this helps...............................