Having ruled out any immediate issues with my heart, lung function tests have been done now. The results were sent to Aberdeen and I have had a chest x-ray and am waiting for the feedback.
The Chest Clinic in Aberdeen want to see me for more detailed tests and have referred me for a CT scan. There is a backlog for routine scans and the priority will depend on the x-ray results.
No timescale as yet but at least I am now in the system.