Incident at 4829N06701W

2010-01-04: The air traffic controller observed TOM076, Boeing 767 300, enroute from London (EGKK) to Cancun (MMUN), off course from the filed route. The filed route was REDBY N206C YRI J560 PLB J29 etc. When the pilot was questioned on the deviation he informed the controller he was flying REDBY direct PLB as filed in his flight plan. After checking the Gander ACC estimate and the Hard Copy flight plan both showed REDBY N206C YRI J560 PLB. The pilot was contacted again and he corrected himself indicating he should be flying N206C YRI J560 PLB. The aircraft was re-cleared by the controller direct to YQB J560 PLB to re-establish the on-filed route. No other aircraft were in the immediate area. There was no impact on operations. Nil TSB.