Digitising historical sea level records in the Thames Estuary, UK.

London is one of the world's most important coastal cities and is located around the Thames Estuary, United Kingdom (UK). Quantifying changes in sea levels in the Thames Estuary over the 20 century and early part of the 21 century is vital to inform future management of flood risk in London. However, there are currently relatively few long, digital records of sea level available in the Thames.