Does the UK not have a transition level as well as a transition altitude, defining the layer between which no aircraft should maintain level flight, so as to ensure separation between those aircraft flying at flight levels and those on local QNH?
Many moons ago, we were taught that a/c climbing change to 1013 as they passed through the T/A and those descending changed to local QNH on passing T/L. Has that changed and noone told me??