It's a mystery to me why it is not standard practice to have the groundcrew ALWAYS standing by with ground power as aeroplanes park. It would save APU cycles and fuel. Financially the extra cost is justifiable IF the airport can deliver the goods reliably. It is done elsewhere. But the chaos that passes for airport administration in the UK means that aeroplanes sit there with APUs running and passengers itching to get off whilst the clearance of the stand, delivery of steps, buses and groundstaff resembles a Laurel and Hardy movie. Usually one, often two, and sometimes all 3 are missing! It's a shambles. Airport managers should be sent to Scandinavia to see how to do it. Because they're a joke at the moment.