The River Rom, also known as the River Beam below its confluence with the Ravensbourne, is a tributary of the River Thames in England that flows through east London suburbs surrounding the metropolitan centre of Romford, part of it forming a section of the boundary between the London boroughs of Barking and Dagenham and Havering. The Rom is culverted for a brief midsection as it passes through the centre of Romford.

The London Borough of Barking and Dagenham is a London borough in East London. It lies around 9 miles (14.4 km) east of Central London. It is an Outer London borough and the south is within the London Riverside section of the Thames Gateway; an area designated as a national priority for urban regeneration. At the 2011 census it had a population of 187,000, the majority of which are within the Becontree estate. The borough's three main towns are Barking, Chadwell Heath and Dagenham. The local authority is the Barking and Dagenham London Borough Council. Barking and Dagenham was one of six London boroughs to host the 2012 Summer Olympics.