Tighter security sees long queues at Heathrow One passenger who endured a long wait to pass through security told The Daily Telegraph: "We saw a lot of people rushing for flights they were late for. There was a lot of confusion and chaos. The passenger said he had waited in a queue of hundreds of people to get airside, noting that security staff were being "very careful" when patting people down. "They seemed to be taking more people than usual aside after they had been through the scanners," he said. The airport has a target in place to get 95% of passengers through security within five minutes and 99 per cemt through within 10 minutes. Missing these targets means it faces a fine. Travellers who risked missing their flight due to the delays were pulled out of the queue and fast-tracked, as well as families with young children. Heathrow would not comment on the reasons behind the implementation of the new security measures, but said they had not led to delays previously. Other terminals were not thought to be affected yesterday. A spokesman said: "We do not comment on the detail of security measures in place for obvious reasons. It is not unusual for security procedures to change. It is hoped waiting times will fall once staff grow accustomed to the changes.