Who owns what?
Transport
Last month Germany's Deutsche Bahn bought the train and bus company Arriva for £1.5bn, swallowing Britain's third-largest operator to create Europe's biggest transport group. Deutsche Bahn is 100 per cent owned by the German state.
BAA, which owns six British airports including Heathrow, was sold to Ferrovial, the Spanish building company, in 2006. And when BAA sold Gatwick last year, it went to Global Infrastructure Partners, a fund including a South Korean pension fund among its main investors.
Energy
The nuclear power station operator British Energy was sold to EDF for £12.5bn in 2008, and the French company has plans for a further four nuclear reactors in line with government targets to increase capacity and cut carbon emissions. Centrica, which owns British Gas, subsequently took a 20 per cent stake in the nuclear group.
The German giant E.ON, the world's largest listed power company, bought into the UK market when it took over Powergen in 2001. In 2002, npower was sold to the Germany utilities group RWE. And in 2006, Scottish Power was taken over by Spain's Iberdrola.
Communications
Five, owned by the pan-European broadcaster RTL, is the only major broadcast company that is not British-owned. But the mobile telephony sector is thoroughly international. Former BT mobile arm Cellnet became O2 and was sold to Spain's Telefonica. 3 belongs to Hutchison Whampoa, a vast conglomerate based in Hong Kong. Orange was owned by France Telecom, and T-Mobile was owned by Deutsche Telekom. This week the two UK subsidiaries merged to form "Everything, Everywhere", held 50/50 by the French and German parent companies.
Water
Germany's RWE sold Thames Water, Britain's largest water company, to Macquarie, the Australian bank, for £8bn in 2006. At the time, Macquarie also owned South East Water, but it was sold on to Australia's Hastings Funds Management when Macquarie bought Thames. South East then merged with Mid Kent Water in 2007, and the new group is owned by Hastings Diversified Utilities Fund and the Utilities Trust of Australia.
Water companies also attract interest from private equity. The infrastructure arm of 3i has a 10 per cent share of Anglian Water Group as well as a junior debt position in Thames Water.