The Lions have scored their third try, through George North.
It was created by Leigh Halfpenny, who caught a high ball, beat two Australian tacklers and drew a third, feeding North to finish in the corner.
Halfpenny couldn't add the extras from out wide, but the Lions lead by 18 points.
More top news
The pit closed in 1996 with the loss of hundreds of jobs.
Pollen levels will remain moderate tomorrow and Tuesday, but will be lower on Wednesday.
It will be a dry evening for most. A band of rain and thicker cloud will spread from the north overnight, clearing in the early hours.