Heathrow could be forced to allow other firms to build third runway to cut costs

Under aviation regulator proposals rival companies would bid to design and build parts of airport expansion

Heathrow could be forced to allow other companies to design and build its third runway and new terminal after the UK aviation regulator argued that rival bids could keep construction costs down.

A long-awaited review by the Civil Aviation Authority (CAA) proposes changes to the regulatory model that governs how Heathrow runs and covers its costs.