Archaeological monitoring was carried out in 2006 during the excavation of a new sewer trench (65m long, 1m wide and 1.4-1.6m deep) at Firstsite, within the southern part of the former bus station, and on three small test-pits dug (1.1m deep) for a bus shelter in Queen Street (outside Roman House).

The deeper groundworks reached a layer of late Roman demolition or robbing debris. None of the ground works, however, were deep enough to expose Roman foundations which these remains are thought to seal.

Within the sewer trench, the Roman demolition debris (or robbing) was sealed by dark earth (where it had not already been disturbed by the existing sewer trench).

In the test-pits in Queen Street, the Roman demolition debris (L7) was sealed by 1.0m of modern material, with no intervening post-Roman layers.<1>