Provision of full ILS on R/W 09 at Sumburgh
Having spent over 25 years of my life in Shetland, I'm fairly confident in saying that Sumburgh has more foggy days than any other airport in UK. Yet there is not a full ILS on runway 09.
Had this capability been available on the day of the recent Puma accident, it would have filled one of the holes in the much-mentioned "Swiss Cheese" of the accident chain.