India's Prime Minister took the opportunity of a meeting with David Cameron to raise his concerns about a deal between Anglo-Italian helicopter firm AgustaWestland and the Indian air force.
Authorities in India are concerned that the £480 million contract to supply the air force with military helicopters may have broken corruption and tax fraud laws.
It follows the arrest in Italy of two executives from the firm and its parent company Finmeccanica.
Mr Cameron said it was a matter for Italian investigators, since Finmeccanica is an Italian firm, but that Britain would cooperate with any requests for information.
More top news
James McClellan, 53, is suing the firm claiming he was branded an 'old buffer' and forced out of his account manager job.
A family's desperate bid to stop a teacher joining Islamic State has been revealed in emotional recordings.
Wednesday unsavoury incident involving Jonny Evans and Papiss Cisse is the latest in a long line of gob-related football controversy