The Crown Prosecution Service (CPS) arguing on behalf of the Indian government countered that assertion, indicating that the reason such a repayment offer would have been rejected was that the banks knew Mallya had the means to pay back the entire amount due.
The 61-year-old businessman returned to the dock for day three of his extradition trial at Westminster Magistrates' Court in London to determine whether he can be forced to return to India to face charges offraud and money laundering allegedly amounting to around Rs 9,000 crores.
Paul Rex, who was described as a banker by profession who has served as an independent expert in the field for over 20 years, said that banks tend to partially provision for loans unpaid over a long period and such an offer would have helped avoid "further loss".
"A commercial bank would assess such an offer against other routes of repayment. If that offer is higher than could be expected from other sources, it would be an attractive option for banks to consider," he said, adding that state- owned banks in particular tend to be more susceptible to "political pressure".
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He also made a reference to the "debtor" [Mallya] throwing a birthday party costing around 2 million pounds as a factor which could have influenced the banks' decision to reject the offer.
The cross-examination of Rex was left incomplete at the end of the third day of the trial, to be taken up again on Tuesday afternoon.
Thursday's hearing revolved around Rexs testimony to analyse the credibility of the documents used by Mallya to seek loans from Indian banks for his then struggling Kingfisher Airlines.
Montgomery sought to back up her opening arguments that the CPS had failed to establish a prima facie case of fraud against her client.
The testimony by Rex was used to highlight that Mallya had no intention to act "fraudulently".
Going over parts of his written witness statements, the banking expert pointed to an appraisal in February 2012 by SBI presented to the Reserve Bank of India (RBI) on the Kingfisher Airlines loan, seeking its recategorisation from "sub- standard" to "standard".
Rex, who highlighted that he has also served as an expert in a previous litigation involving State Bank of India (SBI) and the Board of Control for Cricket in India (BCCI) in the late 1990s, told the court that "banks tend to behave in a herd-like manner" and that banks hold their central banks in a very "high degree of deference".
"SBI is the largest bank in India and one of the most reputable If I was another bank, I would take note of the fact that SBI had supported a business in a positive way," Rex said.
In his cross-examination, Summers flagged a particular "washing machine activity" picked up by the government of India that involved sums amounting to around 10-15 million pounds being funnelled between UB Group companies to wrongly claim obligations of equity infusions into struggling Kingfisher Airlines were being met.
Laying out her counter-arguments before Judge Emma Arbuthnot, Montgomeryhad also called into question the "admissibility" of some of the evidence submitted by the CPS.
She claimed that much of the material was questionable and there were at least a dozen documentssubmitted which read like an identical "template".
The judge has asked both sides to submit a document laying out the factors for and against the admissibility of the evidence submitted by the Indian authorities by the end of this week.
Mallya, who has been based in the UK since March 2016, was arrested by Scotland Yard on anextradition warrant in April this year and has been out onbail on a bond worth 650,000 pounds.
His extradition trial is scheduled to end onDecember 14, with Fridaymarked as non-sitting day.