Seven people have been arrested and 27 addresses raided over an suspected £38m fraud involving the trade of carbon credits to avoid paying value-added tax (VAT).
Officers from HM Revenue & Customs searched both residential properties and offices in both Gravesend and London targeting an alleged network of organised crime.
Members are believed to have been trading large volumes of high-value carbon credits from overseas sources free of VAT.
Tax investigators believe these may then have been sold on to businesses in the UK charging VAT that is never paid to the authorities.
