TalkTalk CEO Tristia Harrison is leaving the company in seven years after 2015 . Current managing director Tristia Harrison will take over the role, while Sir Charles Dunstone will become executive chairman after he steps down as chairman of Dixons Carphone in May. The news prompted TalkTalk shares to rise more than 20% in early trading, having fallen by more than 20% following a major cyber attack in 2015 . TalkTalk, for years dogged by a reputation for poor customer service, estimated the cyber-attack, which divulged nearly 157,000 users' financial details, cost it £42m. TalkTalk was fined a record £ £42m for poor website security, which had facilitated the attack. Baroness Harding , a Conservative peer, said she wanted to focus more on her public service activities.
TalkTalk CEO Tristia Harrison is leaving the company in seven years after 2015 . Current managing director Tristia Harrison will take over the role, while Sir Charles Dunstone will become executive chairman after he steps down as chairman of Dixons Carphone in May. The news prompted TalkTalk shares to rise more than 20% in early trading, having fallen by more than 20% following a major cyber attack in 2015 . TalkTalk was fined a record £ £42m for poor website security, which had facilitated the attack. Baroness Harding , a Conservative peer, said she wanted to focus more on her public service activities.