Davidson Iriekpen The Supreme Court will tomorrow continue its hearing in the case involving the Central Bank of Nigeria (CBN), Union Bank of Nigeria (UBN) and an oil and gas company – Petro Union Oil and Gas Limited (Petro Union) over an alleged £2.550billion fraud. The series of incidents upon which the case is based began in 1994 when Petro Union was alleged to have fraudulently procured a cheque from a branch of Barclays Bank in the UK with a value of £2.556 billion and presented it at one of Union Bankâs branches in Lagos, with a claim that it had a contract purportedly for the purpose of constructing two refineries, a fertilizer plant and a cement paper bag plant.