Prime Minister Narendra Modi on Thursday visited the London Tower Bridge which was bathed in the colours of India.
"A unique tribute to a unique relationship. Iconic London monuments bathed in the colours of India," external affairs ministry spokesperson Vikas Swarup tweeted.
Modi was accompanied by British Prime Minister David Cameron and London Mayor Boris Johnson.
He made the visit after delivering an address to the British parliament, the first Indian prime minister to do so.
Earlier, India and Britain signed a civil nuclear deal following delegation-level talks between the two sides on the first day of Modi's three-day visit to Britain.
