" By the early 20th century Sherwin was making paint with lead-based pigment, even after the company published an article in 1904 warning that "white lead is poisonous in a large degree, both for the workmen and for the inhabitants of a house painted with white lead colors.
Mr Cameron has said he agrees with the White House's warning that chemical weapons use would be a "red line", although he has ruled out sending British troops into action and has spoken instead of support for rebel forces.