London Irish suffered a 19-18 European Challenge Cup quarter-final defeat at Toulon after Paddy Jackson failed to kick a sideline conversion in the 76th minute.
A breathtaking late length-of-the-field solo try by teenage full-back Henry Arundell had given them a chance to snatch victory from the jaws of defeat.
The 19-year-old, who is qualified to play for England, Scotland or Wales, received the ball just in front of his own try line in the 74th minute at Stade Felix Mayol and slalomed his way almost 100 metres at devastating speed to dive over in the corner.
