The pilot was taxiing the aircraft for takeoff at the time of the accident. He had been manoeuvring the aircraft from one side of the taxiway to the other in an attempt to maintain adequate forward visibility. The pilot was wearing his goggles, because of a cold wind, and the sun was in a position that reduced visibility significantly. He observed another aircraft immediately ahead and despite closing the throttle and applying the brakes the two aircraft collided. The other aircraft was stationary on the taxiway whilst the pilot completed the pre-takeoff check list. Visibility from the Tiger Moth's rear cockpit during taxy is less than optimum at the best of times. It is probable that the sun glare momentarily distracted the pilot and he did not see the stationary aircraft until it was too late to avoid it.