Dominic Cork feels Stuart Broad was perfectly within his rights not to walk as controversy continued to dog the first Ashes Test.
Broad clearly edged a ball from Ashton Agar that then came off Brad Haddin's glove and looped up to Michael Clarke at first slip.
But umpire Aleem Dar failed to raise his finger, much to the confusion of the Australian fielders, making it three controversial decisions in the opening two days of the Trent Bridge contest.
Agar was saved from a stumping by third umpire Marais Erasmus on the opening day and Jonathan Trott was given out leg before by Erasmus despite there being no clear evidence that he had not edged the ball on to his pads.
Cork told Sky Sports News: "Have you known any Australian to walk when he nicks it? Michael Clarke and the Australians having a go at Stuart Broad? Seriously Australia - it's sour tactics.
"They didn't worry about Trott on Thursday...they can't have one rule for one and one for another. I've played with Australians who would nick it to second slip and think they could stand there.
"It's international cricket. Get on with it.
"What makes me laugh is Australia standing on that pitch (slating Broad) for not walking. They've done it for about 50 years. Adam Gilchrist is the only player I know who'd walk when he'd nicked it.
"The right decisions are being made, 98, 99 per cent of the time - and that's all you want. As long as technology is used and you say to the players 'we can't guarantee 100 per cent accuracy' they'll be happy with that.
"There's always the one per cent when Hotspot doesn't pick up a little nick. It might be something that goes in the favour of whatever team.
"But the issue is technology. Use it and enhance it. Keep with it, stick with it, have faith with it. It works."
Former England captain Andrew Strauss added: "I think it's one of the conventions in the game that you can get away with, very few would do.
"The review system is in place to get rid of the howler, but Australia used their two on touch-and-go decisions."
Should Stuart Broad have walked?