The entry in 951 Balloon Operations Book reads:-
"30.4.41
Weather:- Moderate easterly wind. Cloudy. No lightning.
21.40
Aircraft collides with cable. Wellington S2502 (N. B. wrong No., should be T2905 - J.C.) RAF Bassingbourn collided with cable at 51/21 and 51/23 and crashed at D Flight site 51/25 - crew of six - 3 killed - 2 seriously injured - 1 slightly injured. Carried H. E. bombs, incendiaries & ammunition which exploded at intervals after crash. 618025 A/C Rowlands of 951 Sq. injured and admitted Bristol Royal Infirmary. Balloon at site 21 broke away. Balloon at site 23 remained flying. Balloons flying at varying heights throughout the day."