​​​​​​​Wessex Archaeology was commissioned by Teesland Development Company, Kennet Properties and the London Borough of Enfield to undertake a series of archaeological investigations at the former Rammey Marsh Sewage Treatment Works, Enfield, London. 

Along with a series of other finds a Roman stone coffin, probably dating to the 3rd or 4th centuries AD, was discovered in archaeological excavations in advance of the Poundbury Stages 3-4 development at Poundbury Farm, Poundbury, Dorchester.

One major discovery by Wessex Archaeology was a Roman mosaic dating to about 350AD at the former County Hospital site in Dorchester in Dorset.

Dorchester has preserved many archaeological finds from its Roman past when it was called Durnovaria. Before building work began on the hospital site, Wessex Archaeology was asked to excavate for possible remains. The excavation, carried out in 2000 and 2001, was the largest archaeological investigation of the town for many years.

Wessex Archaeology record of over 1,000 years of uninterrupted settlement has been discovered in a huge archaeological excavation across six square kilometres (almost two and a half square miles) near Cambridge.

A team of 35 archaeologists have worked on and off for seven years at the site at Cambourne, nine miles west of the city, in advance of the construction of a new settlement with 3,300 homes.