Changes made by Medicines (Aristolochia) (Temporary Prohibition) 1999
S.I. 1999/2889
Made to Medicines (Aristolochia) (Emergency Prohibition) 1999
2 changes. All changes made by Medicines (Aristolochia) (Temporary Prohibition) 1999
From legislation.gov.uk's record of changes, the official one: see it there.