Tetracycline stored at body temperature lost 80% of its potency after four weeks in ordinary solution, but lost none when stored in silk films.

ECONOMIST: Monitor

Investigators in Prince George's County, Maryland, later said the substance appeared to be an ordinary cleaning solution.

CNN: Subway checked for hazardous material; none found

The trust said local people had made it very clear they wanted the department to fully reopen and the trust's willingness to consider "out of the ordinary" ideas was evidence of a desire to find a solution.

BBC: Army medics will not be used at Pontefract A&E unit