Protestors are set to descend on the Indian Embassy in London after the country's missile strikes on Pakistan on Tuesday evening.
At least 26, including a child, are reportedly dead after the attack on nine locations in Pakistan and Pakistan-controlled Kashmir.
The attack came after India accused Pakistan of orchestrating a terror attack in Pahalgam last month, in which at least 26 people were killed. Pakistan denied involvement.
The missile strikes have sparked global fears of an all-out war between two nuclear powers.
Pro-Pakistan demonstrations are set to be held outside the High Commission of India in Aldwych on Wednesday evening.
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