Hi W'daisy (fun name) - Welcome to the Forum. Don't know IF I can add that much to what has already been posted, but have done several long haul flights, 16 to 18 hours with upto 3 flight changes, and three of those flights were midst flare!
Flight - tips:
I requested an *isle seat, not emergency, as they keep the emergency for real able bodied an don't think I fit into that category. Two flights I was also throwing a wretched very swollen and painful knee, so I further requested left hand isle seats so that I could straighten my knee.
Then I requested assistance at the airports to help with luggage. I was brought a wheelchair - one of those electric go-cart thinggies would have been more appropriate - perforce, we put the luggage in the wheel chair and I walked! Suggest you ask for one of those elec buggie vehicles, then it can take ALL of you plus your luggage: think you need to be pretty insistant on getting the elec buggy: walk with a stick, put your arm in a sling, anything...

For my body comfort, I took with me a small down pillow for my back plus for my neck a 'memory foam' neck pillow.
During the flight I ensured that I stood up and walked about several times. Made a nice niche for myself at an exit door and did exercises. Leg and stretch exercises; transferring weight from foot to foot, bending and arm lift exercises. No one took ANY notice...

Only a couple of lfight attendants asking me if I were alright, explaianed that IF I didn't do my 'stretches' my body would seize and I might not be able to move (eek).
I drank plenty of water and also took with me a snack - was not sure what the airlines were going to come up with

(Glad I took a snack!)
Relocating
Scotland is fine. Don't know where you are going to be located, perhaps Benbecula? (Might even possibly relocate to Benbecula - unless I choose Brittany). Edinburgh has an excellent hospital with a good orthopaedic surgeon - who is an American. Glasgow has a good hospital and also Aberdeen. St Thomases London, Leeds, Manchester (Hope Hospital), Leicester and Nottingham are centers of medical excellence. Bath hospital has a well recommended AS unit. You can get private referrels to any of these hospitals. Otherwise, NHS? Will depend on what is available in your catchment area.
Meds, pretty much the same throughout Europe. Except for the DMARDS, which are only just now coming on-stream in the UK. Still diff to getta hold of, and on the NHS? Forget it. Will hardly stand a chance. Privately, no problem, especially IF already on them. Be prepared for many of the doctors and rheumys in the UK being pretty clueless about AS and all the problems attendant on being a spondy.
This link might be useful:
http://www.rheumatology.org.uk/link/patient_support_links/sitemapThis link will be invaluable - choosing your NHS hospital, how to and what hospitals cover the area in which you live - one has a choice nowadays, the 'Patient's Charter':
http://www.nhs.uk/ Here's another one, hospitals and information - finding a specialist:
http://www.specialistinfo.com/directory.php Here's a useful site - on arthritis, leaky gut syndrome - good informative site (you may not sufffer from this, but was in my 'bag' of info!):
http://arthritis.about.com/od/diet/a/leakygut.htm Thinnk that is pretty much all I can come up with on a general note. do have many links for alternatives, herbs, natural alaternatives and where to get them. When you have relocated, and settled down, then please don';t hesitate to e-mail me if you would like any further information along those lines.
Have a great flight, don't exhaust yourself in the thores of packing up and - take care.
Molly C
Keeping on Keeping on (naturally)