BRITISH AIRWAYS CITIEXPRESS........TH (IATA designator)/BRT(ICAO desginator)......TH should only be shown for posn/maint flights only. Im aware some handling agents abroad show TH on the screens which confuses all concerned - pax flights are BA****.
eg. British Airways BA/BAW
BACX - 100% owned by BA PLC but own AOC.
bregards