They were set up at a time when the German occupation of France and the disruption of shipping lanes interfered with drug supplies .
The County Herb Committees were a nationwide medicinal plant collecting scheme , established by the British Ministry of Health during World War II .
County Herb Committees were set up at a time when the German occupation of France and the disruption of shipping lanes interfered with drug supplies .
The County Herb Committees were a nationwide medicinal plant collecting scheme , established by the British Ministry of Health during World War II .