Mayor denies u-turn after government releases Department for Transport savings to help improve capital's air quality
New scoping paper reveals government supports aviation expansion, but "not at any price"
Unrest in North Africa prompts government to reduce speed limits, increase biofuel blends and cut rail fares in attempt to save oil
Transport minister calls for public to back scheme that will bring £44bn to UK economy by 2070
Government's plans for HS2 route from London to Birmingham fails to impress green groups
Transport secretary confirms plans have been altered in light of environmental concerns