Last year, 0.27 million visitors from India came to London and that figure is set to hit 0.52 million in the next eight years.
In terms of spend, visitors to London from India spent 258 million pounds (USD 333 million) in 2016, which is projected to rise to 721.2 million pounds (USD 931 million) by 2025 - a 180 per cent increase, according to the data by London & Partners, the business arm of the Mayor of London's office.
"Visitors to the capital bring huge benefits - the industry boosts London's economy, as well as supporting hundreds of thousands of jobs and showing the world that London is an open, welcoming and diverse city," said Sadiq Khan, the Mayor of London, at the launch of a new 'Tourism Vision for London' during the city's "Autumn Season" launch.
London's tourism industry is worth 11.6 per cent of the capital's GDP and 9 per cent across the UK as a whole.
More From This Section
Visitor spending is also set to grow by almost 50 per cent to 22 billion pounds (USD 28 billion) a year, up from 14.9 billion pounds (USD 19.3 billion) in 2016.
The surge in visitor numbers could be bolstered in the short-term by currency fluctuations, and according to research from London & Partners around two-thirds of international visitors say they're more likely to visit London given a more favourable currency rate.
For the new Tourism Vision, London & Partners has collaborated with more than 100 of the capital's tourism leaders, including the Greater London Authority, Gatwick Airport, Hilton and the Association of Leading Visitor Attractions, to define a new vision for the tourism industry.
"As a combined force, we believe that if this vision is realised, tourism will drive economic growth and stimulate the city's cultural scene, support even greater numbers of jobs and strengthen London's reputation as an open and welcoming city," L&P said.