St Helena's existing airport is problematic due to wind shear and tailwinds - the existing route flying in there takes fewer passengers than the planes they use can normally take to compensate for the difficult conditions, and the geography of the island makes a larger runway problematic.
Ascension would be more likely, given that it has a runway intended as an emergency runway for the Shuttle, and it has a bunch of communications facilities (GCHQ, NASA, ESA, BBC Atlantic relay) as well as US and UK military facilities.
Ascension would be more likely, given that it has a runway intended as an emergency runway for the Shuttle, and it has a bunch of communications facilities (GCHQ, NASA, ESA, BBC Atlantic relay) as well as US and UK military facilities.