Wattisham is being extended by a month
In a few days, there will be four UK SAR Helicopter Service bases operational
Both of these statements can't be true.
However, a combinations of AW's lateness with the 189, Balfour Beatty's roofing skills and surprises from the regulator, have particularly conspired against Inverness
Perhaps the resources (human and otherwise) available to train incoming aircrew may be something to add to your list.
The three nearest the equator will all have NVG capability
Down to ground level?