The road through Dauntsey Lock, linking Chippenham with Lyneham and Royal Wootton Bassett, was formerly the A420 which was a main route from Bristol to Swindon and Oxford.
The road through Dauntsey Lock, linking Chippenham with Lyneham and Royal Wootton Bassett, served as a significant route between Bristol and Swindon and Oxford before being re-designated.