asked Her Majesty's Government:On what date in 1993 Ciba Geigy withdrew epichlorohydrin from its formulations of Top Clip Gold Shield sheep dip; whether the Veterinary Products Committee was advised of this change to the formulation; and whether they were aware of the reasons for the withdrawal. [HL1086]

The stabiliser, epichlorohydrin, was replaced in the production of diazinon, the active ingredient of Top Clip Gold Shield sheep dip, in 1981 when it was removed from the formulation by the manufacturers of the active ingredient due to its suspected carcinogenicity. There is no record that the change was reported to the Veterinary Products Committee.