Geophysical survey prior to the upgrading to motorway status of the A1 in the vicinity of Boroughbridge, North Yorkshire, identified a new Roman castra site with double defensive ditches, a series of outwork defences, and strong indications of extramural activity on both the north and south banks of the river Ure. Excavation permitted the examination of a corridor over 0.5 km long through the extramural settlement. Dating evidence suggested a period of occupation ranging between a.d. 71 and at least the first, and possibly the second, half of the 80s.