Monaghan and Ulster champions Blackhill overcame Thomas McCurtains to progress to the last four of the All-Ireland Junior club championship writes Michael Cooke.
Michael Geehan scored two goals helping them win out by 2-11 to 10 points.
The London side trailed by three points in injury-time but Blackhill finished with a flourish to keep their All-Ireland dream alive.
The first goal came in the ninth minute when Blackhill were awarded a penalty. Geehan subsequently rattled the back of the net.
The goal initiated a period of dominance for Blackhill as they led by four at the interval.
Michael Geehan and Hugh Byrne racked up 1-4 collectively in the first half while Jason Finnegan and Tommy Geehan also got off the mark.
Niall Coffey and Colm O’Neill were among the scorers for the London side as they trailed by 1-6 to 0-5 at the break.
McCurtains narrowed the gap to three points twice in the second half thanks to points from John Winters and Conor Murphy.
The Geehans extended the margin in the last few minutes as Tommy scored a point and Michael bagged his second goal.
It was a seven-point victory in the end as the Monaghan club advance to the last four of the All-Ireland junior football championship.