A final report on the excavation of the Jubilee Line Extension project which revealed evidence for the Holocene environment of the Thames Valley 10,000 years ago. Excavations uncovered a 12 km stretch of sedimentary deposits which contained a number of rich archaeological sites that illustrated the fluctuating nature of the Thames floodplain and river. Particular attention is paid to the Holocene environments of Westminster, Southwark, Rotherhithe and Canning Town.