The closure is apparently due to the remaining platform having being been condemned. A friend of mine passed by the station today, and remarked that the reason for the condemnation was not obvious to him. In fact, the platform remains accessible to the public (see attached images which he sent me).
Whilst admittedly not in great condition, it certainly does not seem any worse than other wooden-platformed stations of a similar era and design. So the sudden closure is rather perplexing.
Is there any reason why the station wasn't built nearer, in a more convenient location to Teesside Airport? Surely when it was being planned and built, it could have been in a more suitable location.
As with many airports in Britain, the railway crosses the runway approach path at an oblique angle - or rather, the other way around as the railway definitely came first, being part of the Stockton & Darlington which opened in 1825 - and the terminal is halfway along the runway.
With runways at commercial airports typically being on the order of 1.5 - 2 miles long, that means there's a considerable walk, no matter where you position the station on the line. Given the relative position of the runway, terminal and railway line, the station couldn't really be much closer without having its own branch.
The question we should really be asking is - why did they twice refurbish the terminal (effectively rendering it brand new) in the same position as the old one, rather than building a new terminal closer to the station? It's not as if there is a shortage of available land around the airport.
Whilst the airport and hence the station is never going to be massively busy, there are some quick wins here that aren't being taken up. For all that the Mayor talks about sustainability, he hasn't even bothered to organise a minibus to shuttle between the station and the terminal, let alone pushing Northern to run a useable train service.
As for the footbridge, it surely would not be beyond the wit of mankind to erect a temporary structure, as was used at Workington North for example, if it is deemed to expensive to repair the existing footbridge.