PPE for most glyphosate products is wellies, coveralls and gloves, i.e. less than we use when we're inspecting the bees. If they weren't wearing that, while using hand-held equipment, they were breaking the law and you could have reported them. Still could, if you knew when they were doing it and what they were wearing. The HSE are the people to contact, they control pesticides in this country.
A pesticide label is a legal document which must be complied with by the user.