Heathrow airport and its supporters of a third runway constantly cite jobs as a justification for third runway. But the unemployment rate is now at its lowest rate for 4 decades. (Office for National Statistics bulletin.)
There are all sorts of reasons for unemployment, but there is not the slightest evidence that insufficient runway capacity is causing or will cause unemployment.
Meanwhile many employers can’t fill existing vacancies.
In fact, the Airports Commission said a third runway would encourage immigration into the area with consequent pressures on housing, schools, hospitals and public transport.