Mr Hussain said he would have to call her every morning after he finished work, but could not contact her on the day she was killed, and then he heard that a mother of three had been found dead.

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Thanks to the modernisation of the telecoms networks after privatisation, 15, 000 Argentines now work in call centres, many of them handling queries from across Latin America.

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If my assistant or nurse is tracking me down after fielding a phone call, they are not available to perform work that will lead to income.

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Ashiq Hussain, of Leagrave Road, Luton gave evidence and said he also had to call her at 02:00 each morning after he finished work at a restaurant.

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We not only had to work our full-time hours, but I was on-call after hours 20-25 nights every month.

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