MORE than 11,000 Nigerians from the oil-producing Niger Delta have filed a compensation claim against Shell at the London High Court, the latest step in a case that will test whether multinationals can be held to account for the actions of overseas subsidiaries. In 2021, the UK Supreme Court allowed a group of 42,500 Nigerian farmers and fishermen to sue Shell in the English courts after years of oil spills had contaminated land and groundwater. The judges said at the time there was an arguable case that Shell, one of the world's biggest energy companies, was responsible because it exercised significant control over…