On 25 July 2019, the Supreme Court granted Mastercard permission to appeal the Court of Appeal’s judgment of April 2019. The Court of Appeal judgment had allowed Mr Merricks’ appeal against the CAT’s refusal to grant him a collective proceedings order in his claim against Mastercard. The claim concerns claims for damages from overcharging resulting from the level of multilateral interchange fees that, it is argued, were passed on to merchants and consumers. See UK Competition Newsletter, April 2019 for more details.