UPDATE
  taPresentation
SET
  ProspectID           = @nProspectID,
  AttendanceDate       = @dAttendanceDate,
  AttendanceTime       = @dAttendanceTime,
  ConsultantID         = @nConsultantID,
  ConsultantRole       = @nConsultantRole,
  OutcomeID            = @nOutcomeID,
  Duration             = @nDuration,
  TimeSpent            = @nTimeSpent,
  TimeTravelled        = @nTimeTravelled,
  DistanceTravelled    = @nDistanceTravelled,
  TravelMode           = @nTravelMode,
  TravelParkingCost    = @nTravelParkingCost,
  TravelTollgatesCost  = @nTravelTollgatesCost,
  ContactTitle         = @aContactTitle,
  ContactFirstName     = @aContactFirstName,
  ContactSurname       = @aContactSurname,
  ContactEmail         = @aContactEmail,
  ContactAreaCode      = @aContactAreaCode,
  ContactTelephone     = CONCAT(@aContactTelA, @aContactTelB),
  PresentationProducts = @aPresentationProducts,
  PresentationStage    = 'Open',
  Description          = @aDescription
WHERE
  (PresentationID = @nPresentationID)
