U2 singer Bono and his wife Ali took to the high seas yesterday for lunch with Russian billionaire Roman Abramovich. The meeting with the Chelsea owner took place on 'The Rising Son' yacht moored in the Mediterranean off the French coast which is owned by billionaire Larry Ellison, CEO of the software company Oracle. Bono, who has a holiday home in the south of France, is recovering from surgery he underwent last May for a compressed sciatic nerve in his back.