World Cup-winning All Blacks coaches Graham Henry and Steve Hansen have proven tigers for punishment.
They have accepted invitations to coach the Barbarians against Australia on November 26.
Clearly having prepared the All Blacks to face their trans-Tasman rivals twice during the Investec Tri Nations and in the semi-finals of the World Cup wasn't enough.
Barbarians chairman John Spencer, a British and Irish Lions in New Zealand in 1971, said: "This is a great coup for the Barbarians. Having seen at first hand in New Zealand in recent weeks the high regard in which both Graham Henry and Steve Hansen are held by the rugby fraternity at large, capped by the All Blacks being crowned as world champions, we are absolutely delighted that they are coming to the UK to coach the Barbarians."
Several of their All Blacks players will be with them at Twickenham. Sonny Bill Williams and Keven Mealamu will appear for the second time for the Barbarians while joining them will be Jerome Kaino, Piri Weepu and Adam Thomson.
They will play alongside players like Jamie Roberts and Leigh Halfpenny from Wales, and the South African pair of Bryan Habana and Victor Matfield. Others to appear include: Stirling Mortlock, Danny Cipriani, Jason White, Stephen Jones, Ryan and Adam Jones.
After the Barbarians match, England will play a repeat of the 2010 Women's World Cup final against New Zealand.