Good link but according to this council document only 7% of their income comes from the airport while they intend to spend £168 million in this financial year on mainly the airport and a planning application for new homes. I suspect most of that £168m will go on the next payment for the Dart but £47 million is down for the first payment of the T2 access road called Century Park. This road is costed at £124m and that doesn't include turning it into a dual carriageway.
https://www.luton.gov.uk/Council_tax...ax-booklet.pdf