![British Telecom (BT)'s headquarters is seen in central London, Britain May 10, 2018. Reuters](https://thenational-the-national-prod.cdn.arcpublishing.com/resizer/v2/P6HP6CEOM2RJQIJKE3IPW5OCQ4.jpg?smart=true&auth=2d67ad3bdfe747f24e2f68d1a84f937b2a4c3e729ffb7a32d3c45324cdcf7e1f&width=400&height=225)
British Telecom (BT)'s headquarters is seen in central London, Britain May 10, 2018. Reuters
British Telecom (BT)'s headquarters is seen in central London, Britain May 10, 2018. Reuters
BT faces lawsuit and £600m fine on overcharging claims
British telecoms giant in legal battle over claims it overcharged landline customers