JUMP SEAT REQUESTS, once the last resort with a full aircraft, and very popular with a certain ilk of passenger, have been finally banned by the Department of Transport, even for staff of the airline in question. An exception can be made for flying crew travelling to and from duty and this remains at the captain”s discretion. But woe-betide anyone caught cheating. Enthusiastic passengers will now only be able to reminisce to the next generation how they squeezed into the third seat of a Shorts 360, watched the Canary Wharf towers on the old steep approach to London City, or tell astonished Japanese board members that they could be spotted on the golf course at the end of the Narita runway. Hong Kong”s Kai Tek was always the most popular for spare seats on the flight deck but you had to be brave! top