Gilnockie Bridge carries the former line of the A7 and B720 across the River Esk approximately a mile north of Canonbie near the English border. It is a substantial twin arch stone bridge perhaps dating back to 1793, although other records suggest it is mid or late 19th Century. Only the larger of the two arches normally spans the river, the western arch being a flood arch. They are separated by a massive stone pier, almost an abutment of similar width to the smaller arch, which is built on the rocky bank and so appears to be devoid of cutwaters. The bridge was widened in the twentieth century by the addition of cantilevered metal pavements, leaving a wide two lane carriageway between. The pavements are protected by modern steel railings as parapets. Until the Canonbie bypass opened in 1984, the bridge carried the A7. It was then part of the extended B720 for around 18 months before a landslide a little to the south of the bridge closed the road. Therefore since the B720 was shortened in 1987, the bridge has carried an unclassified road.
