It has been updated to show 2 x 2 D barcodes.1st of October in Scotland and in the beginning only proof of double vaccination will be accepted (ie no lateral flow test). Exceptions for those that cant have the vaccine etc but not sure how you can prove that.
I expect us to follow shortly after if not the same time
Downloaded mines last night.Last for a year.
NHS Scotland COVID Status
How to download the NHS Scotland COVID Status app (vaccine passport) or get a paper copy for international travel
www.nhsinform.scot