Tilbury is a port town in the borough of Thurrock, Essex, England. The present town was established as separate settlement in the late 19th century, on land that was mainly part of Chadwell St Mary. It contains a 16th century fort and an ancient cross-river ferry. Tilbury is part of the Port of London with a major deep-water port which contributes to the local economy. Situated 24 miles (38.5 km) east of central London and 23 miles (37 km) southwest of Southend-on-Sea, it is also the southernmost point in Essex.

Gravesend is a town in northwest Kent, England, situated 21 miles (35 km) east-southeast of Charing Cross on the south bank of the River Thames and opposite Tilbury in Essex. Located in the diocese of Rochester, it is the administrative centre of the borough of Gravesham. Gravesend marks the eastern limit of the Greater London Built-up Area, as defined by the UK Office for National Statistics. In 2021 it had a population of 58,102.