December 2021 - Work begin; July 2021 - Costain has secured a contract from Highways England for the design and management of the construction and upgrades of the A1 road; January 2021 - UK government has granted development consent to Highways England for the rehabilitation; March 2020 - Construction is expected to start in 2021; September 2019 - Planning Inspectorate has accepted Highways England's project application for examination; November 2018 - Contract awarded to Costain; Project cost - GBP220mn