The MBA and its accessories are now in the custody of UPS. I did explore the possibility of doing a visit to my local Apple store. It is open for click and collect plus returns. Trying to find out from Apple if I could cancel the pick up and replace it with a store visit proved frustrating. The after sales team I spoke with all have English as a second language and their knowledge on the returns policies in the country the customer is calling from is stretching their ability.(No disrespect intended)
I shall be in the USA early next year and I will make a purchase then. It does work out a lot cheaper doing it that way. Ive been using American keyboards for a long time.
Back to High Sierra and my 2011 MBP plus the latest iPad Pro.
Comfort was at least restored in part after hearing my issue was not a stand alone one. Other unfortunates do exist.