The London Plan download section
Hazardous substances
4A.34 Dealing with hazardous substances
LDFs should include policies relating to the location of establishments where hazardous substances are used or stored, and to the development of land within the vicinity of establishments where hazardous substances are present in order to limit the consequences of any potential accidents. The Mayor will and boroughs should take into account the presence of hazardous substances in making policies and determining applications that relate to the development of land in the vicinity of establishments where hazardous substances are stored.