Quartet in Barbarians squad

Williams, 35, is the only British Isles player to make the starting XV but the veteran flanker is joined by club mate John Yapp and Aironi duo Salvatore Perugini an Quintin Geldenhuys in the squad.

In invitational side is mainly made up of Southern Hemisphere stars and Australian Matt Giteau will lead the side against the world champions.

Barbarians: James O'Connor (Aus); Joe Rococoko (NZ), Drew Mitchell (Aus), Adam Ashley-Cooper (Aus), Ma'a Nonu (NZ); Matt Giteau (Aus, capt), Will Genia (Aus); Salvatore Perugini (It), Stephen Moore (Aus), Neemia Tialata (NZ), Anton van Zyl (Stormers), Chris Jack (NZ), Rodney So'oialo (NZ), Martyn Williams (Wales), Colin Bourke (Chiefs).

Replacements: Keven Mealamu (NZ), John Yapp (Wales), Quintin Geldenhuys (It), Daniel Braid (NZ), Andy Ellis (NZ), Stephen Donald (NZ), Seru Rabeni (Fiji).