The 2008 tournament winners will be top dogs for a second season running thanks to an eight try success that saw them finish the pool stages with six wins and 27 points.

George Ford celebrated his senior England call up with another assured display that included a well-taken try and 12 points from the tee, while Semesa Rokoduguni grabbed a brace and Tom Biggs, Anthony Perenise, Jonathan Joseph, Dominic Day and Kyle Eastmond also crossed in a 54-13 success.

Bath enjoyed a dream start as Biggs crossed with just over a minute played following a stunning burst from Anthony Watson. The new England squad member sliced through the Bordeaux midfield from deep in his own territory and Biggs was on hand to dive over five metres in from the right touchline.

Ford converted with ease despite the difficult angle to put Bath 7-0 up but Bordeaux responded in fine fashion with a brace of penalties from Manu Saubusse to cut the gap to a single point before the 10-minute mark.

Biggs came close to a second try on 22 minutes after he wriggled free from Ford’s inside pass following a strong carry from Francois Louw but the rugby league-bound winger lost control as he stretched for the line.

The West Country faithful had to wait until seven minutes before the break to celebrate a second try as the visitors more than held their own as Bath struggled to keep hold of possession in the wet conditions. A period of sustained pressure eventually resulted in Ford dancing through from close-range, with the youngster’s conversion giving Bath a 14-6 advantage.

The next score followed almost immediately, though, as Bath stamped their authority in some style. Rokoduguni chased up Ford’s well-placed chip ahead and, when Bath won turnover ball and patiently recycled possession, Leroy Houston’s long pass put prop Perenise in at the left-hand corner.

Another excellent conversion from Ford gave Bath a 21-6 lead to take into half time and they had the bonus point in the bag just five minutes after the restart as Joseph sliced through from Ford’s pass on the edge of the 22.

Bordeaux came close to opening their try-scoring account through prop Patrick Toetu but instead it was Bath who celebrated their fifth score when Day picked up the loose ball after Ford’s kick caused havoc on 50 minutes.

Ford added both conversions and did the same again when Rokoduguni flew down the right wing for a fine individual try with 58 minutes gone.

Bath led 42-6 at that point and it was 47 just past the hour when Eastmond was driven over from a move that started with a stunning burst from replacement prop Nathan Catt.

Ford missed for the first time in seven attempts and it was Bordeaux who finished the stronger as they refused to buckle. They were rewarded with a try by Gilem Queheille with two minutes left as they made the most of Ryan Caldwell’s yellow card but Bath had the last laugh when Rokoduguni scored his second with the final play and Matt Banahan converted.