Referees' chief Keith Hackett believes the latest failure to award a clear goal highlights the need for goal-line technology.The Premier League are pressing ahead with trials on a system being developed by the company Hawkeye. The latest controversy came at the weekend when assistant referee Ian Gosling did not award Fulham a late goal at home to Middlesbrough when David Healy clearly forced the ball over the line. Gosling will miss out on a match this weekend as a result. Hackett said: 'It is still in its testing stage but we hope when it is judged to be fail-safe then it will be used. 'Everyone in football recognises that goal-line systems can provide help for the referee to make his decision.'' He added: 'Clearly the assistant referee has made an error, so he won't be operating next week for us.'' Meanwhile, referee Rob Styles has apologised to Liverpool after admitting he was wrong to award a penalty to Chelsea during the 1-1 draw at Anfield yesterday. The match official has accepted he made a mistake in penalising Steve Finnan and as a result he will not be given a match to referee this weekend. Styles said: 'All referees enter into matches hoping not to make any mistakes but understanding that they may happen, what none of us want is for any mistake to potentially affect the result of the match. 'Yesterday, in mistakenly awarding a penalty, I accept that I may have affected the result of the match and for that I apologise.'' Styles awarded Chelsea a penalty which enabled the Blues to equalise even though Finnan appeared to make no contact with Florent Malouda.