The Tees Flex DRT scheme is likely to end this year - you'd almost be better off repurposing that or some random BSIP funding.
Even this from 2021 seems more feasible
Now a Tees Valley Combined Authority (TVCA) transport report has revealed its unlikely to have any more services until the overhaul at Darlington Station is completed.
The paper stated: “Due to rail capacity constraints it is proving difficult to identify opportunities for service enhancement until after completion of the Darlington Station project in 2024. “Work is under way to develop a scheme to upgrade the station, which could facilitate a future increase in services.”
Buses run from Darlington station to the airport at the moment.
A 2020 combined authority report estimated the cost of making the current airport station safe – by removing a platform and the existing footbridge – would be about £700,000.
Chiefs ruled out moving the seldom-used stop closer to the terminal in 2019.
In the past, suggestions including more shuttle buses and even a horizontal travelator have been put forward to boost its use.