Gatland to blood Blues’ Roberts in Scottish clash
Roberts has been preferred to Mark Jones, who has dropped out of the matchday 22, while Tom Shanklin replaces Sonny Parker at outside centre and Ian Evans starts in the second row after Alun-Wyn Jones was ruled out with an ankle injury.
Jonathan Thomas, who was doubtful after taking a heavy blow to the head in a tackle from Jonny Wilkinson, has been cleared to play and starts at blind-side flanker.