On 27 September 2021, the CAT issued its judgment on an application by the proposed Class Representative Mr Le Patourel, for a Collective Proceedings Order (CPO), and an application by BT (a) to strike out the claim pursuant to Rule 41(1) (b) of The Competition Appeal Tribunal Rules 2015 (the Rules) on the basis that there were no reasonable grounds for making it and/or (b) for summary judgment to dismiss the claim pursuant to Rule 43(1)(a) of the Rules on the basis that it had no real prospect of success. The case concerns a claim that BT abused its dominant position in two telecommunications markets by imposing unfair prices, contrary to section 18 of the Competition Act 1998 (CA98). Mr Le Patourel brought the claim in respect of approximately 2.3 million affected BT customers. Subject to the question of merits, BT did not resist the making of a CPO on an “opt-in” basis but did oppose the making of an “opt-out” CPO. The CAT did not accept BT’s application on either ground, deciding that an opt-out CPO should be granted.