In what was largely a kicking duel between Nicky Robinson and Valentin Courrent in the second half, Agen's two tries occurred when Gloucester were reduced to 14 men with firstly Peter Buxton and then Mike Tindall sent to the sin bin.
Redpath pulled no punches when asked where it had gone wrong after the break:
"Hugely disappointed. At half time, at 13-3, we were fairly comfortable and then the two yellow cards so we played for 20 minutes with only 14 men."
"We didn't control possession well enough in the right areas of the pitch but, as I say, the killers were the yellow cards. It's as simple as that and we have to take it on the chin."
Despite not having had the opportunity to review the match DVD, the Head Coach was asked if he thought that the sinbinnings were justified?
"We can have no complaints about the two yellows. They both deserved to go and it gave the momentum to get into the game and gain good field position."
"We lost the game because we played for 20 minutes with 14 men in the second half. That's a simple fact and that's end of."
"13-3 at half time away from home is good and you'd take that every time. But, and there's no point us hiding from it, it was the two yellows in the second half that killed us."
And there was no disguising the disappointment at Gloucester only leaving Agen with a losing bonus point:
"I'm hugely disappointed as it was an easy enough game to win. We should have won that game. It wasn't about the changes we made from last week. We had a bit of control and did a lot of good things and, from 13-3, it should have been easy. "
"We weren't dominant but we had control. But, at 13-3, one score and you're back in the mix. We gave away some penalties, some stupid ones and it cost us points. In general terms, we lost the game rather than them winning it."
"They were a side with a bit of power, a good pick and go. They're big strong men but we needed to have a full complement of men on the pitch at all times."