London, Sep 16 - A British high-society beauty who is accused of lewd and drunken behaviour with a fellow passenger on a Kingfisher flight was on the 'verge of being dangerous', the captain of the flight has told a British court.

Capt Vivek Sondhi told Isleworth Crown Court in London Tuesday he noticed Carol Irby and Daniel Melia 'sprawled' over two rows of seats when he walked around the aircraft four hours into the Bangalore-London flight.

'When I was in economy, I saw these two people. They asked me for a drink which of course I refused.

'In normal circumstances, there is no guest on board who will offer a captain a drink. It is very abnormal,' Sondhi told the court, which is trying Irby, a descendant of the wealthy family that owns Guinness beer, and Melia.

Irby, 30, was arrested along with Melia March 26 when the flight touched down on Heathrow.

Staff and passengers on the flight have accused the two of lewd and drunken behaviour, including kissing and cavorting while Melia's girlfriend slept.

However, Irby, whose late grandfather Robert Henderson was the chairman of Kleinwort Benson, the private bank, insisted she had no more than four or five glasses of wine during the flight and was very tired.

She also denied romping with Melia, declaring: 'Nobody touched my breasts, this was something I'd remember as a woman, I assure you.'

The court heard that Detective Constable David Sexton of Heathrow CID, who interviewed Irby after her arrest, told her: 'You have been arrested for being drunk on an aircraft and lewd behaviour on an aircraft.