Rocio Concha, Which? Director of Policy and Advocacy, said:
“Which? has campaigned long and hard for an effective collective redress scheme, but with no claim under the new regime reaching a full trial, consumers have not yet had the results they need.
“If successful, this opt-out action would be welcomed by many BT customers who were found to have been historically overcharged for years, but saw no refund as a result.”