Planes begin to land at airport but airlines said the closure would continue to have a ‘huge impact’ on passengers in the coming daysBritish Airways (BA) said it expects to operate about 85% of its scheduled flights at Heathrow airport on Saturday, as it recovers from a lengthy closure of the travel hub after a substation fire, reports the PA news agency.The airline would usually expect to run nearly 600 departures and arrivals on Saturday but it is understood cancellations will be made, where possible, to high-frequency routes.We are planning to operate as many flights as possible to and from