A month after the attack and vandalism on the High Commission of India in London by pro-Khalistan supporters, a team from the NIA is likely to be in London soon as part of their anti-terror probe on the matter. The attack was seen as a retaliation to the Indian government's crackdown on radical preacher Amritpal Singh. Meanwhile in London, it is an uneasy quiet among Sikh community members. Who were the attackers and why did they choose London to react?