I seem to have to argue with pilots all the time to go behind a 757. Some will, some won't, even within the same company, drives me mad, even asked one are you ready for an immediate behind the 757, answer yes, then lines up and refuses to roll. Result same company go around. Bet that was fun in the crew room later. Pilots say that it is company restrictions, well I don't work for your company therefore I don't know these rules, anyway you went a minute behind yesterday. F***ing pilots