Spurs are familiar with M Anderson, using them to build the club's training ground in Enfield. This, obviously, will be a much bigger job, with the company charged with building a 56,000 seat stadium.
The contract Spurs signed calls for the stadium to be finished by 2018, allowing the club to play the 2018-19 season back at home. As was already announced, the team will have to spend a season without a home, after White Hart Lane is torn down and before they can move into their new ground. That will be the 2017-18 season, as was previously indicated.
There was some concern before about when the stadium would actually be built because the first announcement was only that the stadium wouldn't be ready before 2018, but without actually locking down a date. If the reports of this contract with M Anderson are true, though, then 2018 is locked in by this deal, giving Tottenham a firm date by which the stadium will be completed.