Video: Indian PM challenges David Cameron over bribery scandal The controversy has threatened to overshadow Mr Cameron's visit to India, which he hopes will boost trade and investment in the areas of energy, infrastructure, insurance, banking and retail. Manmohan Singh, Indian Prime Minister told the media in a joint press conference with David Cameron that his country has expressed its "serious concerns regarding allegations about unethical means used in securing" the deal to sell helicopters to Indian military. Under the deal, the companies were to sell 12 helicopters to India. Mr Cameron said Britain would respond to any request for information on the deal by the Italian firm Finmeccanica and its British subsidiary, AgustaWestland.