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Tuesday 15 July 2025 6:28 pm  |  Updated:  Tuesday 15 July 2025 7:25 pm

BT back in court as landline customers seek to revive £1.3bn class action

By: Maria Ward-Brennan

Professional Services Editor

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The representative of a class action against BT, alleging that it “disproportionately overcharged” its landline customers, is seeking to overturn a court ruling that sided with the telecoms giant.

The legal action on behalf of more than 500,000 customers, by law firm Mishcon de Reya, went to trial at the Competition Appeal Tribunal (CAT) in January 2024. Consumer champion Justin Le Patourel lent his name to be the claimants’ representative.

The claim alleged that BT charged excessive prices regarding “standalone” fixed voice services, notably for older customers, and that this constituted an abuse of a dominant position.

A spokesperson for BT at the time said: “This claim relates to a technical landline pricing issue which was resolved by Ofcom in 2017. We do not accept that our pricing was anti-competitive back then, and are committed to robustly defending our position at trial.”

The proceedings were certified in October 2021, and despite BT trying to appeal that decision to the Court of Appeal, the case proceeded to a full trial at the Tribunal.

The claim was estimated to be worth £1.3bn if successful.

However, after an eight-week trial in early 2024, the Tribunal handed down its decision in December, siding with the telecoms giant. Speaking at the time, a spokesperson for the BT said the “CAT has fully dismissed the claim and found that BT Group’s conduct did not breach competition law.”

The claimants requested permission to appeal to the Tribunal but were refused in February.

The claimant’s application was denied, and the Tribunal ordered the class representative to pay 85 per cent of the defendant’s costs, which was in the region of £14m.

The representatives submitted an application to the Court of Appeal a month later.

Now the parties will attend a one-day hearing on Wednesday, as the class representative asks the court for permission to appeal the Tribunal’s decision in favour of BT.

A BT spokesperson told Morning Wire: “In December 2024, the Competition Appeal Tribunal handed down its judgment in the case of Justin Le Patourel v BT Group plc, dismissing the claim and finding that BT Group’s conduct did not breach competition law. We take our responsibilities to all of our customers very seriously and believe that was the correct decision.”

Read more

BT braces for loss of 800,000 customers as it banks on fibre to keep turnaround ‘on track’

A sign at the headquarters building of BT Group Plc in Aldgate, (Photographer: Hollie Adams/Bloomberg via Getty Images)

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