For all enquiries related to the Enhanced Capital Allowance Scheme for energy-saving investments and the Energy Technology List please contact the Carbon Trust Customer Centre on 0800 085 2005. If your enquiry is related to a specific technology or product application please contact the ECA Scheme Administrator via email ECAquestions@carbontrust.co.uk .For tax enquiries relating to the ECA Scheme, please contact Nick Williams at HM Revenue & Customs on (020 7147 2541), Fax (020 77147 2640) or Email nicholas.williams@hmrc.gsi.gov.uk.For further advice on energy efficiency, please contact the Carbon Trust helpline on 0800 085 2005 or visit www.carbontrust.co.uk.