TalkTalk boss Dido Harding resigns to 'focus on activities in public service'

TalkTalk chief executive Didio Harding has stepped down after seven years in the job. 
The boss will be replaced by current managing director Tristia Harrison, while longtime employee Charles Blingh will take up the role of chief operating officer. Both have been on the TalkTalk board since 2014. 
The company has also announced that founder Charles Dunstone will become executive chairman of the company, after leaving his role as chairman of Dixons Carphone in May this year.