Welcome to WES, Ward Environmental Services Limited WES is the foremost Off-Mains Drainage Consultancy covering Sussex and the Southeast. We are specialists in the Off-Mains drainage sector and offer a range of services based on 30 years of knowledge from working in product design, manufacture, sales, installation and maintenance of all things Off-Mains, in short, if you’re Off-Mains, you need to speak to us! Off-mains drainage is simply required where any property, domestic, industrial or commercial that produces foul waste that cannot be connected to the main sewer. Whatever your circumstances or requirements, we can help.