The Official Online RBS 6 Nations Store is open. The store has everything you need to get behind your team during the RBS 6 Nations, plus the store is now fully stocked with a much wider range of rugby merchandise.
"Castres have certainly been one of the surprise packages this year," he said. "With a strong kicking game and solid defence they deserve to be at the top going into Christmas.
"Now they are at the top, however, no-one will be taking them lightly, but I still think they will be strong come the end of the season.
"Another surprise package this season has been Racing Métro 92 from Paris .
"Moving into a higher league is never easy, so being up there at this stage is a great achievement.
"They play in a similar manner to Castres with two great kickers and two very quick wingers, which make them a very difficult team to play against."