Review |

The true story of Indian assassin who avenged massacre by British at Amritsar in 1919 – after a 21-year wait

• British soldiers gunned down 400 to 600 unarmed protesters in Amritsar, India, in 1919. Udham Singh survived the massacre
• 21 years later in London, he shot dead an East India Association official. His thrilling story is told in The Patient Assassin, by BBC journalist Anita Anand