Refer to figure:Two consecutive waypoints of a flight plan are Stornoway VOR/DME (N58°12,4', W006°11,0') and Glasgow VOR/DME (N55°52,2', W 004°26,7). During the flight the Actual Time Over Stornoway is 11:15 UTC and Estimated Time Over Glasgow is 11:38 UTC. At 11:21 UTC the fix of the aircraft is exactly over reporting point RONAR. What is the Revised UTC over Glasgow, based on this last fix?