BT agreed with Ofcom to reduce the future bills of these neglected customers, but it did not compensate them for past overcharging. In response, earlier this year, Justin Le Patourel launched Justin Le Patourel v BT Group Plc and British Telecommunications Plc in the Competition Appeal Tribunal (CAT). The action sought compensation for the historic overcharges and for individuals who were excluded from BT's voluntary reduction. Under the UK's competition regime, a person wishing to bring a class action on behalf of customers (and/or businesses) must first secure approval from the CAT. Le Patourel's application was heard by the Tribunal in a two-day hearing from 24 to 25 June 2021. BT argued that the claims were not suitable to be brought in collective proceedings, often known as class actions.