It is not every day that a visiting dignitary is from his own birthplace.
Vishal Gosain is from PM Modi's home state Gujarat. He says he was specially requested by the Metropolitan Police for Mr Modi's security detail, mainly because he speaks Gujarati, the prime minister's native language.
"I feel very, very special. I am very excited...it is a really good event," said the policeman, wearing all black and the flags of the two countries pinned to his chest.
"I was asked to come here so I could speak in Gujarati to the supporters of Mr Modi," he told NDTV, sharing that his family was also very excited.
A group of supporters plans to tail PM Modi wherever he goes.
Vishal Gosain says he will be present at Wembley Stadium, where PM Modi will address an expected 60,000 members of the Indian community tomorrow.
Asked whether he had anything to say to the prime minister, given a chance, the cop replied in Gujarati: "I am an Indian, I stay in London, I am very proud to be Indian. Jai bajrang bali!"
During his visit, PM Modi will meet with British Prime Minister David Cameron, lunch with Queen Elizabeth and also interact with industry leaders.
The British police have made special arrangements to check against any trouble after some groups have threatened protests against PM Modi.
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