21.   Along the course, ice formed on bridge railings and trees, and some runners fell on patches of ice.

22.   And although it was much warmer inside, ice was forming the wrong side of the observation windows of the Cable and Wireless balloon.

23.   Ice formed on bridge railings and trees, and some runners fell on patches of icy street.

24.   The crew had been warned ice could form on the wings, but investigators said conditions were not harsh enough for authorities to ground the plane.

25.   The crew were told ice could form on the wings, but investigators said conditions were not harsh enough for authorities to ground the plane.

26.   Ice formed on a part of the wing not covered by de-icing equipment while the craft was in a holding pattern waiting to land, according to the report.

27.   The ice formed on a part of the wing not covered by de-icing equipment.