Former Nigerian petroleum minister Diezani Alison-Madueke appeared in a London court Monday in connection with bribery allegations involving more than £100,000, as British prosecutors move forward with a long-running corruption case tied to her time in office.
Alison-Madueke, who served as Nigeria’s oil minister from 2010 to 2015 and later became president of the Organisation of Petroleum Exporting Countries, is accused of accepting cash and other benefits in exchange for awarding lucrative oil and gas contracts, allegations she has previously denied.
The preliminary hearing, which included technical matters and jury preparation ahead of the full trial, was listed Monday before Judge Thornton. The main trial is scheduled to begin Jan. 26, 2026, and is expected to last about 10 to 12 weeks.
Alison-Madueke, who has denied all six charges, has been on bail since her arrest in October 2015, when British police detained her in London on corruption allegations.
Allegations and Court Process
Prosecutors allege that between 2011 and 2015 Alison-Madueke abused her official position to accept a range of benefits — including cash, chauffeur-driven cars, private jet flights and use of London properties — from those seeking government oil and gas contracts.
In addition to cash, the indictment describes alleged perks that included payment of private school fees, luxury vacations and designer brand gifts.
Two co-defendants are also facing bribery charges in the case: Doye Agama, who appeared via video link, and Olatimbo Ayinde, who was present in court Monday.
Backstory and International Efforts
The legal saga against Alison-Madueke traces back more than a decade, with authorities in the United Kingdom and Nigeria pursuing different strands of corruption and asset recovery linked to her tenure as petroleum minister.
In August 2023, the United Kingdom’s National Crime Agency (NCA) formally charged her with bribery offences, accusing her of receiving illegal financial rewards in exchange for multi-million-pound oil contracts.
British authorities imposed bail with strict conditions after her initial court appearances, including a £70,000 bail bond, an electronic tag and a nightly curfew.
The Nigerian Economic and Financial Crimes Commission (EFCC) has also sought to bring her back to Nigeria to face separate corruption charges and has initiated extradition proceedings, though those efforts have yet to lead to her transfer from the UK.
In January 2025, the United States and Nigeria signed an agreement to repatriate about $52.9 million in assets connected to alleged corruption tied to contracts during her time in office. U.S. authorities said proceeds from those contracts were used to buy luxury properties and the superyacht Galactica Star.
Previous Legal Issues and Controversy
Alison-Madueke’s legal and public reputation has been contentious for years. In Nigeria, she has faced civil suits and asset forfeiture actions by the EFCC related to alleged corruption, though she has at times pushed back against those claims, citing health issues and asserting her right to a fair hearing.
The long delay between her 2015 arrest and the upcoming trial exemplifies the complexity of cross-border corruption cases involving high-ranking officials and multiple jurisdictions.