David Cameron pushes Mumbai-Bangalore development corridor
Cameron's office said British and Indian officials had been working with business representatives from the two countries on the Mumbai-Bangalore project since last year and had produced an initial assessment of its scale and potential.
The British government would be willing to co-fund a feasibility study, on a match funding basis, with the Indian government costing up to 1 million pounds ($1.55 million).
By 2030, if realised, the project could generate close to half a million jobs, while indirect jobs could bring the total in the region to two million, Cameron's office said.
"Our initial scoping work suggests that accommodating the 3-4 million people attracted to each of the new cities would require close to 1 million new homes, up to 120 schools, 10 colleges and hospitals," the office said.
Cameron also said Britain planned to change the visa system to allow Indian business people to get a visa in one day.