Vernon-BronfentrinkerIn the latest sign that commercial litigation finance is shaping global litigation, Quinn Emanuel Urquhart & Sullivan said on Wednesday that it is readying a novel $25bn (£19bn) UK claim against MasterCard on behalf of British debit and credit card holders.

The action, which Quinn Emanuel said it expects to file in a specialised competition tribunal in late July or August, will be the largest case by far under a year-old UK law that expands the ability of private parties to seek collective redress for violations of UK competition law.