Originally Posted by
MPH1980
out of T5 all that matters is the barcode and AIUI it is only encoded into CW and F tickets now. Once youre in less automated airports (e.g. a connection) it can help if they are manually filtering the bags into containers.
Flying Y from LHR and checking in from the selv-tagging check-in machines/counters, my printed and self-applied luggage tag said in capital "PRIORITY" above the destination (s/h). I am Gold.