Burgh Fleet and Monkham Sewer is a minor, long riverâÂÂbrookâÂÂand drainage ditch of the Pevensey Levels in Hailsham, Wealden District of East Sussex, England. It rises at Manxey Pumping Station in the civil parish of Wartling, briefly flowing southerly before turning westward and flowing underneath Wartling Road via a culvert. After receiving the waters of Sew Ditch, Burgh Fleet and Monkham Sewer resumes its southerly course for before giving rise to Chilley Stream in the Russells in the Marsh field.