If memory serves, Scatsta has a better weather factor than Sumburgh. However if the runway at Sumburgh has been extended, have they installed an ILS? It's technically feasible. It seems unbelievable that an island vital to the nation's economy should not be served by a decent modern all weather airport.
And yes, I do mean "all weather"; the Government needs to finally wake up to a strategic asset. The people who work in support of North Sea Oil at Scatsta and Sumburgh and their Shetland friends need and deserve the best infrastructure for some of the world's worst weather conditions - and I don't mean a VOR, nor do I mean uncertified GPS. Modern aircraft deserve better.