Carphone Warehouse today upgraded its profits forecast for a third quarter in a row, despite falling sales at its European business.

Carphone Warehouse’s TalkTalk broadband arm made its stock market debut today as the company split 21 years after it was founded by Charles Dunstone.

Carphone Warehouse today said it would press ahead with a demerger of its TalkTalk broadband arm in Britain from the group's retail business.