From the report:
"The owner mentioned to some friends that he would be flying his microlight from a field near Alloa, Scotland on 12 April 2012 and invited them to attend. Two of them arrived at the field. One of them had limited knowledge of aviation and the other was an experienced microlight pilot."
"Power was increased but not sufficiently to take off, and the aircraft accelerated to a fast taxi speed. After it stopped the experienced pilot explained to the owner that he would need full power to become airborne."
Hmmmm.