Privatisation was one of the great achievements of the Thatcher era. But it is becoming increasingly evident that the transfer of monopolies into the hands of regulated companies that own, run and develop the assets is flawed. This is excessively costly to consumers. It is also an obstacle to investment in risky long-term assets such as airports, nuclear power , electricity and gas networks.

This is not to argue that privatisation is devoid of benefits. Where competition could be introduced into the newly privatised industry, as in the case of telecommunications, the gains were huge. Elsewhere, privatisation was the way to allow essential activities to escape from the dead hand of Treasury curbs on public investment. Private finance was more expensive, but investments were at least made.