We have one due to the fact we clean various things for the EA - Roofs/Solar Panels/Windows Gutters etc They want
IPAF - PASMA - CSCS - They also want RAMS as though they are books
They never bother with the silly stuff like CHAS-SAFE CONTRACTOR etc THEY WANT SITE SPECIFIC
The Waste Carriers Licence doesn't cost too much and lasts for 5 years - worth it in case you get caught.