Allotmenteers may find the following site useful. 

Consumer Notice is a USA based consumer advocacy organisation that informs the public about the health and safety risks associated with defective products, environmental dangers and other hazards and presents legal options to those who have been injured through the fault of another person or entity. 

Visit https://www.consumernotice.org to learn more about this.

Of particular note is their section Toxic Pesticides and the alternatives available to using Roundup.