Just 20 minutes up the road is the delightful GA airfield of Fishburn - it also has a lovely cafe/restaurant that is popular amongst locals (and not so local people).
Views are available of the activity at the airfield.
The restaurant is open for most of the day, and throughout the week, producing good quality food - why can’t Teesside Airport main terminal offer similar?
An opportunity to encourage people to the airport who wouldn’t normally come - perhaps someone is thinking ‘outside of the box’ here?
Best of luck to them.