Not a new topic I know, surely inside one country the standards should be the same.
I had the misfortune to transit through Manchester today, I have never seen so many rejected bags at the scanners in any airport worldwide. One of the biggest elements contributing seemed to be the non removal of smaller Kindle sized devices triggering a rejection, not something that seems to bother any other airport I have been in over the last 12 months. There were many bewildered people who didn’t understand what they had done wrong.
The airport itself isn’t a shining example of progress and good design, use of space, not something that can be fixed quickly or without considerable investment, may be better to start again elsewhere and just bulldoze that one..