Martin Lewis, a renowned money expert, has warned Barclaycard customers that they could face significantly longer debt repayment periods due to a reduction in minimum monthly payments. From July 22, Barclaycard will implement a new payment scheme, potentially impacting 80% of its customers. This move has sparked concerns that individuals who only make minimum payments could prolong their debt, leading to increased interest charges. Lewis urges customers to be vigilant and consider making fixed monthly payments based on their affordability, even if it exceeds the new minimums. Barclaycard, on the other hand, maintains that the changes aim to provide greater flexibility and support for customers with persistent debt.