Baby food manufacturer SMA is withdrawing batches of its Gold and White milk substitute formula because of a suspected link between the product and Britain's first case of infant botulism in the last seven years. A six-month-old girl whose details have not been released was suspected of suffering from the rare form of food poisoning in June, but the link with SMA Gold powder was only made last week when scientists discovered formula in the baby's home contaminated with the same strain of bacterium the girl is carrying. Authorities stressed last night that this evidence is not enough to prove the link.