Lord Nazir Ahmed, who was born in Pakistan-occupied Kashmir, raised in South Yorkshire and has regularly made common cause with "Kashmiri Pakistanis", is leading the campaign that will involve five billboard vans traversing the streets of London.
On Friday, a group led by the politician will gather outside the Indian High Commission in London.
"It will be a peaceful demonstration by a small gathering because we cannot have very large numbers outside the High Commission," he said.
Uttar Pradesh deputy chief minister Dinesh Sharma, who was in London to attend the Education World Forum earlier this week, dismissed the protest as "fringe elements" keen to foment trouble.
Meanwhile, some pro-India groups have also organised a 'Chalo India House' demonstration in London to "celebrate India's Republic Day by opposing anti-India lobbyists".