Department of Health and Food Standards Agency revised guidance for health professionals on safe preparation, storage and handling of powdered infant formula.
You may also find the following useful:
http://www.dh.gov.uk/en/Publicationsandstatistics/Publications/PublicationsPolicyAndGuidance/DH_4123619http://www.efsa.eu.int/science/biohaz/biohaz_opinions/691_en.html
Infant Formula - revised guidelines Feb 2008