BT warns that splitting the firm would 'derail' investment

BT's chairman has warned that splitting Openreach from BT would 'derail' the investments that the firm is making in high-speed broadband.

Sir Mike Rake was defending his company after MPs warned that BT would have to raise investment in broadband or risk having Openreach split from BT.

They also criticised the quality of service offered by BT's Openreach, and said it must put its "house in order".