Edinburgh Airport is also down, suspending all flights after an "IT issue with our air traffic control provider". Not sure if this is coincidental, but the timing is rather suspicious!
Not a safety-critical system but I know passenger information screens in at least some airports are just full-screen browsers displaying a SaaS-hosted webpage.
Annoyingly I wanted to fly a parcel from Edinburgh up to Stornoway, but it's looking like I'd be quicker driving the seven hours up to the ferry terminal myself.
