He moved to Britain and practiced before the Privy Council. He financed the British Committee of Congress and its journals in London. In 1865 Dadabhai Naoroji founded the London Indian society and Bonnerjee was made its general secretary. When Bonnerjee became the Congress president Naoroji along with him, Eardley Norton and William Digby opened The Congress Political Agency, a branch of Congress in London. He unsuccessfully contested the 1892 United Kingdom general election as a Liberal party candidate for the Barrow and Furness seat. In 1893, Naoroji, Bonnerjee and Badruddin Tyabji founded the Indian Parliamentary Committee in England.