Tower Place - two watching briefs were undertaken between February and June 2006. The excavated area was sited 10m outside the standing medieval walls on both occasions. The first watching brief was undertaken to monitor the excavation of a single trench exposing an existing sewer pipe and facilitate the installation of a new manhole tower and cover. The second watching brief was undertaken to monitor the excavation of a single trench exposing an existing sewer pipe and allow for access and repair. Lord Mayor's - This watching brief was undertaken 23/10/06 to monitor the excavation of a single pit to expose an existing sewer pipe, allowing for inspection and repair. High Petergate - This watching brief was undertaken in February 2007 and oversaw the excavation of six preliminary trenches to locate existing water and gas services, and the re-excavation of a 19th century trench. Tower Place - The first watching brief undertaken was at a depth of 1.9m a sewer pipe of brick construction was encountered with excavation continuing to both sides to expose the top 50% of this feature and a smaller connecting ceramic sewer pipe. Ceramic building material of the same type as that used to construct the brick sewer and modern pottery fragments were unearthed throughout. No archaeological features were encountered. The second watching brief was undertaken and the trench measured 1.8m x 1.6m with a maximum depth of 1.63m. The deposits within this trench were composed of gravels, silts and sands in varying amounts, all representing modern redeposited material. At a depth of 1.5m a sewer pipe of brick construction with sandstone flagstones covering a previous repair was encountered. Excavations continuing to the north side of the sewer to expose the damaged area allowing repair. Ceramic building material of the same type as that used to construct the brick sewer, modern pottery fragments and ceramic drain pipe were unearthed throughout. No archaeological features were encountered. Lord Mayor's - The pit measured 1.7m x 1.3m with a maximum depth of 1.1m. Only one corner of the pit (the north-western) appeared to contain an undisturbed soil sequence. Beneath 0.3m of loamy topsoil was a dark brown sandy clay containing post-medieval brick and tile, and 19th- to 20th-century pottery sherds. This deposit was interpreted as the gradual fill of the moat. Above this was a discontinuous layer of yellow-brown clay up to 0.15m thick, which appeared to have been deliberately depos...