Calling all BT customers – past or present. You could be owed up to £400 in compensation.

BT stands accused of overcharging 3.7m UK consumers. Register to check if you're owed up to £400.

3.7m BT customers, many of whom are vulnerable or older people, may also have been ripped off to the tune of £1.3bn. The trial came to a close in March and a decision is due very soon.

You could be eligible for hundreds of pounds in compensation, depending on the length of your contract.

Register today to check if you could be eligible to claim.

Consumer Voice will keep you updated and tell you whether you'll be able to claim compensation.

The more people who register to check, the more we can hold BT to account for its rule-breaking.

How this happened:

In 2017 Ofcom, the telecoms watchdog, found BT had been overcharging its standalone landline customers since at least 2009. It had been continuing to put up the price of landlines despite the fact costs had been falling since 2009.

After Ofcom's ruling BT reduced its line rental price for some customers but it didn't compensate customers for its historic overcharging. This overcharging affects 3.7 million UK landline customers, many of whom are older and vulnerable and could be owed up to £400 each.