Khurshid said the Indian Government has not been able to

get "concrete materials" from Italian authorities and a CBI team from here has gone to Milan in Italy to get material and details about the case. "Our courts have to issue them and they have to be addressed by Italian courts. But it (Letters Rogatory) is the best and strongest method available to us and hope that will work," the External Affairs Minister told reporters here. A Letters Rogatory is a formal request from a court to a foreign court for some type of judicial assistance. "We are not able to get concrete materials from Italians. So far whatever they have done, we have reacted and responded. But up to this point they have not indicated anything. They are unable to share with us anything," Khurshid said. He said it was little premature to reach any conclusion on the issue as the CBI team from India is there to get details. "Our team is there to gather information and materials which can be analysed when they come," he said. On whether the issue would be taken up with British Prime Minister David Cameron during his visit here as AgustaWestland is based in UK, Khurshid said, "No idea. I have no idea. I have not looked at the agenda. "I know what the agenda was a week ago. I don't know what the agenda is, is there a revised agenda at all. I would think that one prepares an agenda much before because it is shared on both sides and you can't take any visiting dignitary by surprise. "It will really depend upon how much consultation has taken place. And it may not necessarily be something of his level because there are many levels at which the investigations and outreach is taking place and it is only in due course that then it goes to the highest level. It may not be at his level and, as I said, I am not aware of the (revised) agenda," he said. BJP has alleged that the government had kept Parliament in the dark over the internal probe being carried out by the Defence Ministry on the issue. The Left parties have demanded cancellation of the contract with AgustaWestland, which has already delivered three of the 12 choppers.