An archaeological watching brief was undertaken on an intermittent basis between the 6th of November 2004 and the 14th of January 2008 along the route of the 33kv reinforcement cable. As part of this project, approximately 5.12km of trenching was inserted along roads and across common ground on the northern and eastern sides of the City of Cambridge (extending from TL 45310/61375 to TL 44805/59002). Monitoring of this work revealed evidence of a possible 12th century channel, a 14th century laneway and the foundations of 17th century warehouses within the area of the new electricity sub-station at 24 Thompson's Lane, along with the remnants of 17th to 19th century cellars located beneath nearby St John's Road. In addition, evidence of an extensive network of palaeochannels running across the Jesus Green and Midsummer Common area was uncovered; these were succeeded by numerous episodes of consolidation and ground-raising activity, dating from the 17th to 20th centuries, along the southern bank of the River Cam.