Leaving holding, flying the approach and attempting a landing without clearance is a rather big c*** up if you ask me. Looks like Pori is a combined TWR & approach unit run on single freq. Anyone know if they have radar data available to them in the TWR? If not, they controller really can't detect it!
As for RVR measuring:
As a result, human observer RVR is now done from defined positions away from the runway.
How on earth can you measure accurate RVR away from the RWY with the Mk.1's?? 50 meters from the edge, and you get a slant view of the edge lights. (And I know the regs state that you must do it on the runway, at least in Norway and Sweden.)
As for the airline, I've seen Pegasus just clear the rwy end lights and barely get airborne in a tailwind departure with a 737, so I'm not really surprised. They pioneered a new runway and ENGM as well. Prejudiced I know..... 