The MAS report, titled Indebted Lives, identified the UK's five most over-indebted areas as: Hull, Nottingham, Manchester, Knowsley and Liverpool. Around two-fifths of adults in all these areas are struggling with debt.
At the other end of the scale, Richmond upon Thames in south London has just 1.2% of its population struggling with debt, according to the report.
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Lord Hain has raised concerns that British financial institutions in South Africa could have been used as conduits for laundered money.
People could suffer vision loss or infection from the lenses, which are often sold illegally online, in shops and on market stalls.