A decline in Arcor's value was one of the main factors behind Vodafone's £4.5bn asset writedown in its results announced last month. As an initial step to Vodafone's exit, a formal agreement between it and Deutsche Bahn is imminent. Vodafone will receive about £700m for Arcor's line infrastructure, which runs alongside most of Germany's railways, and those assets will be shifted into a separate company.