The following information has been posted elsewhere on the web [insertions/amendments by me]:
'According to an unofficial report, the pilot passed the finish line [presumably of a competition] with his Ventus CT with high speed. The flaps seemed to be in a positive position. Then, the flaps slipped immediately in a negative position. This created a big up and down movement of the wings and the right wing broke away. The picture shows the glider 2 seconds before the impact on ground, 50 m away from the spectators. No failure of the glider's structure was detected up to now. [I have deleted here an opinion as to cause. CN] The pilot (69) had over 2000 hours on gliders and he participated several times in regional or national contests.'
The picture referred to has been said to show the glider vertical from the ground at about 80ft with only one wing attached to the fuselage.
I cannot vouch for the accuracy of the above, though I am sure it was posted in good faith by those concerned.
Chris N.