Februaryconference 11Environmental Risk Rating. Certa event. The Brewery, London EC1. Contact Bhavini Patel on 020 79036531 or certa.comconference 24Encouraging Affordable Housing: Key Policy Issues. Speakers from the Chartered Institute of Housing, TCPA, House Builders Federation and Housing Corporation. Cavendish Conference Centre, London. For information call 020 7787 1212 or see thewaterfront.co.uktechnical briefing 24Implementing Sustainable Urban Drainage Systems. Free technical briefing …