Think I am right in saying that a taxiway to the 20 threshold would need to be on the eastern side of the runway (ie, via a crossing point at the existing mid-runway taxiway/holding point), as there isn't space to fit one in the other side?
Looking at it in Google Earth, a car park and the 20 ILS glidesplope aerials are in the area where a taxiway would need to go, as far as I can see.