The duo met while walking the red carpet and exchanged pleasantries. Shahrukh was all praise for Abhishek and said that he's a wonderful actor. He added the story of Raavan (from what he heard from Mani Ratnam) was beautiful.
Ironically, Shahrukh plays a superhero in Ra.1 while Abhishek's character in Raavan is negative. Aishwarya Bachchan and Vikram are the other cast of Raavan. It is releasing worldwide today.
Some may take it as sheer coincidence but Bollywood stalwarts Shahrukh Khan and Abhishek Bachchan bonded at the London premiere of Raavan in spite of their tight schedules. Shahrukh is currently in the city shooting for his home production Ra.1, so, he obliged when the Bachchans invited him.