British Airways Boeing 787-9 G-ZBKN operated the London Heathrow – Abu Dhabi sector of BA73 London Heathrow – Abu Dhabi – Muscat this morning, however the onward service to Muscat was cancelled. As a result the return BA72 Muscat – Abu Dhabi sector was also cancelled and BA72 operated as an Abu Dhabi – London Heathrow service using callsign BA72D.