Last updated on .From the section Football

QPR were denied a goal at Blackburn earlier this month when Conor Washington's header at Blackburn had crossed the line

Championship clubs have agreed "in principle" to use goalline technology from the start of next season.

Clubs agreed to the decision on Thursday and it will be presented at the EFL annual general meeting in June.

The Premier League started using Hawk-Eye technology in 2013 and it is already used in the play-offs.

"This decision is about providing officials with as much support as possible," EFL chief executive Shaun Harvey said.

1. Seven fast-frame cameras located above and around each goal, such as on a stadium's roof, track the ball's movement within the goal area. 2. Computer software analyses information from all the cameras and, as soon as it detects the ball has crossed the goal line, sends a signal to the official's watch. The result can be relayed within one second and is said to be millimetre accurate. 3. Hawk-Eye can also provide definitive replays to TV outlets.

The system notifies the referee if the ball has crossed the goalline via a vibration and optical signal sent to the officials' watches within one second.

Goalline technology is currently used in the Premier League, Serie A, Ligue 1, the Champions League, the World Cup and the European Championship.

Queens Park Rangers boss Ian Holloway called for the Championship to start using the technology after his side were denied a goal at Blackburn earlier this month when replays showed the ball had crossed the line. The R's went on to lose the match 1-0.