Ashes 2013: Jonathan Trott wants DRS changes

England batsman Jonathan Trott says the decision review system should be changed to help batsmen.

DRS has been criticised after a series of controversial decisions during the Ashes between England and Australia.

Currently, when a decision is reviewed, there must be clear evidence of a mistake for it to be overturned by the television umpire.

"Maybe more benefit of doubt should go to the batsman," Trott told Radio 5 live's Sportsweek.

Ashes Hot Spot controversies

Jonathan Trott, first Test at Trent Bridge

South African third umpire Marais Erasmus overturned Pakistani on-field umpire Aleem Dar's original not out decision for an lbw appeal from Mitchell Starc even though he did not have access to Hot Spot. It was Trott's first ball, and the host broadcaster was using Hot Spot to show a replay of the previous wicket.

Usman Khawaja, third Test at Old Trafford

The Australia batsman was given out caught behind off spinner Graeme Swann by on-field umpire Tony Hill. The review showed no Hot Spot mark and no audio, but third umpire Kumar Dharmasena upheld Hill's original decision. Australian Prime Minister Kevin Rudd called it "one of the worst cricket umpiring decisions I have ever seen". 

Kevin Pietersen, third Test at Old Trafford

Pietersen reviewed the decision of on-field umpire Hill after being caught behind in the second innings. The verdict was upheld by third umpire Dharmasena on the audio evidence, despite no mark showing up on Hot Spot.

"More benefit of doubt is going to the umpire with regards to defending an umpire's decision."

Trott was wrongly given out lbw by the TV umpire during England's victory in the first Test at Trent Bridge when replays showed an inside edge.

England captain Michael Vaughan has called for Hot Spot, which uses thermal imaging to help detect whether the ball hits the edge of the bat, to be removed from the DRS process.

And former umpire John Holder says the current umpires need more training to help prevent errors.

While Trott remains in favour of the review system, which was introduced by the International Cricket Council on a trial basis in 2008, he admitted: "DRS is under pressure and, (under) the scrutiny of an Ashes series, there are a few grey areas that have been shown."

Asked about the standard of umpiring in the Ashes, he added: "That has come along with the DRS and put the umpires under a bit of pressure. They sort of go hand in hand with each other.

"DRS does create a bit of atmosphere and bit of tension in the game for the spectators. It creates a bit of drama.

"There are a few things that could be looked at but I don't think it's a bad system at the moment.

"We should straighten out the rules and get clarity with how it should work and how decisions are going to be made, then the players or the spectators won't have a problem."

You can listen to Trott's full interview in Sportsweek on BBC Radio 5 live at 09:00 GMT.