Interesting thread , something which may help in your search , not sure if the regulations/rules are the same, but have you asked the local council for the MSDS (material data safety sheet ) for the product being used ? Here in the US all companies and employers are required by law to keep on file all materails in use at their facilites that an emmployee may be exposed to,and make them available upon request at any time , .......this includes anything from a bag of lime , Paint, various gases stored in clyinders (oxygen, acetylene etc.) even products seemingly inocuous such as steel and bagged cement, even the little bottles of correction fluid which most office employees have in their desks (its an inhalent hazzard).
I'm thinking from reading past posts on this site that Health and Safety regulations in the UK are much stronger than here in the US so such information should be available on demand from the faciltiy where it is being used
Material safety data sheet - Wikipedia, the free encyclopedia
HSE - Control of substances hazardous to health (COSHH)
