Just randomly looking at prices for this if I were to fly tomorrow from Teeside to Heathrow and return Thursday. £229 each way and the train at similar times from Darlington to Kings Cross is £113 return and only takes 2 hrs 30.
I appreciate the airport is probably underwriting losses and there might a demand for onward travel for Heathrow flights but will business demand really return when things are back to 'normal' when the train is so competitive price and time wise?