Theresa May has now signed a letter to trigger Article 50, the start of the official process to leave the EU.
Oxford Pollution Named And Shamed
Oxford is among the British and Irish locations named and shamed for breaching safety levels for air pollution.
The World Health Organisation warn poor air quality is a major cause of disease and death.
One way the global health body assesses air quality is by examining the levels of a type of pollution known as 'particulate matter' - also known as PMs.
WHO's latest data shows Oxford breached the safe limit set for PM10.
As air quality declines, the risk of stroke, heart disease, lung cancer, and chronic and acute respiratory diseases, including asthma, increases for the people who live in these areas, the health body said.
Dr Flavia Bustreo, WHO's assistant director general for family, women and children's health, said: ``When dirty air blankets our cities, the most vulnerable urban populations - the youngest, oldest and poorest - are the most impacted.''
MTR will run the franchise with First Group for seven years from August, taking over from Stagecoach.
Thames Valley Police has launched an appeal for witnesses after a fatal collision in Aylesbury.
It crashed and landed on its side near the bank of the River Thames at Mapledurham.
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