But Mark Easter's try was followed by a double sin-binning for Saints duo Phil Dowson and Calum Clark.
Importantly, it was the first time in this season's competition England did not have anyone sin-binned.
Portugal flanker Joao Uva was then sin-binned for 10 minutes after persistent handling on the floor.
The hosts were reduced to 13 men with Julian White and Andy Goode sin-binned.
Each side also had a man sent to the sin-bin in a game of few highlights.
Jarvis was sin-binned early in the second half and Bristol took advantage with a penalty try.
Any hope of a comeback disappeared when prop Deacon Manu was sin-binned for foul play.
Bradford, who had Sam Burgess sin-binned after 32 minutes, finally came to life after half-time.
Warrington's Vinnie Anderson was sin-binned in the 23rd minute for holding down Kirk Dixon.
First, he sent scrum-half Thomas to the sin-bin for not retreating at a penalty.
Paterson converted in front of the posts and Robinson was sent to the sin-bin.
The Munster wing was rightly sin-binned for the offence and Hook struck the penalty.
Las Vegas' success as an oasis for sin-seekers owes itself to a lack of any other trade.
Veteran flanker Williams may have been fortunate not to be banished to the sin-bin for that offence.
Biarritz flanker Thierry Dusautoir was sin-binned five minutes before the break for deliberately slowing the ball down.
BBC: SPORT | Rugby Union | European Club | Ulster 8-24 Biarritz
If a player is sent to the sin-bin, the advantage to the opposition is called a powerplay.
And it was Sole's sin-binning on 57 minutes, with the score poised at 26-16, that proved critical.
Two quick sin-binnings for the French side gave Bath every opportunity to get back into the game.
BBC: SPORT | Rugby Union | European Club | Montferrand 38-22 Bath
Greg Johnson's score, coupled with Rhinos' Luke Burgess being sin-binned, had the Wildcats 4-0 up at half-time.
The Tigers' hopes suffered a major blow when replacement Michael Korkidas was sin-binned just after coming on.
Connacht captain John Muldoon was sin-binned on his 100th cap for Hook's third penalty before the break.
Sunday's final began with the sin-binning of front row players Jim Gannon, of Widnes, and Barrow's Brett McDermott.
But he followed it up by being sent to the sin-bin after back-chatting the referee once too often.
The northerners then lost Neil Best for 10 minutes with the Ireland international sin-binned for a blatant offside.
After some twisting and turning the third scrum also imploded and Deon Carstens was sin-binned for his involvement.
The Wasps forward was sin-binned for putting his knee into the back of Springboks scrum-half Fourie du Preez.
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FORBES: Dollar Chains Tap Smokes, Booze to Drive Sales, Fight Wal-Mart's Small-Format Stores
In the 34th minute Harlequins' Mike Ross was sin-binned for persistent infringement following a series of broken scrums.
He was sin-binned during the match for the offence, but a citing commissioner felt it deserved a red card.
Munster flanker Frankie Sheahan was sin-binned for a professional foul in added time and Sexton converted the resulting penalty.
BBC: Ronan O'Gara is tackled by Stanley Wright and Trevor Hogan
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