Recently we checked in for a BA flight at Edinburgh Airport to Gatwick. Our bag weighed 19.2kg on the scales. Two hours later the same (unopened) bag was checked on a Easyjet flight. The scales read 19.9kg which if it had gone over 20kg would have possibly been subject to additional payment with Easyjet.
This is an increase of 3.6%, Presumably both airports will calibrate the scales on a regular basis. Is there any accepted variance in the industry?