Former OPEC president and former Nigerian Minister of Petroleum Resources, Diezani Alison-Madueke, appeared before a London court on Monday in a preliminary hearing ahead of her full trial on bribery charges linked to her tenure as Nigeria’s oil minister.

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The charges relate to allegations that she received bribes in exchange for granting oil and gas contracts while in office. The court appearance marks a key step in the long-running legal process surrounding corruption allegations against the former minister, who also once served as president of the Organisation of the Petroleum Exporting Countries (OPEC).

Her full trial is expected to take place at a later date, as proceedings in the UK continue under anti-corruption and money laundering laws. The case has attracted significant international attention due to her former high-profile roles in Nigeria’s oil sector and within OPEC.