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Usury laws in the UK were repealed in stages between 1833 and 1854. By 1854. the prevailing cap on interest rates was 5%, having been brought down progressively from 12% to 8% and then 6%.
Having said this, the concept of usury did make a re-apprearance (albeit in an indirect form) in the Consumer Credit Act 1974. Until 2007, the English courts were empowered under the 1974 Act to revisit a loan if it was deemed to be "extortionate" and, in determining this, the court could consider the interest rates prevailing at the time the bargain was made. Although this power was rarely deployed, in 2004 a rate of 39.4% was held to render a loan "extortionate".
The Consumer Credit Act 2006 has now replaced parts of the 1974 Act and, under the current law, the courts have the power to revisit credit agreements if an agreement creates an "unfair relationship". However, unlike the 1974 Act, this test does not expressly refer to interest rates. The OFT's view is that there is scope for the court to find that a credit relationship unfair on the grounds of the borrower's costs but precisely what rate of interest might cross the threshold is unclear due to the limited case law.
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