Leeds have all-but guaranteed their place in Super League for 2020 after overcoming London 36-10 at Trailfinders Sports Ground.
The result leaves Richard Agar’s side four points ahead of the Broncos with two games left to play.
However, the Rhinos’ points difference is over 200 better than Danny Ward’s side, meaning it will take a miracle for the Londoners to realistically reduce the gap.
They were well on their way to victory before half-time thanks to tries from Tom Briscoe, Ava Seumanufagai and Jack Walker, all converted by Rhyse Martin.
The hosts reduced the deficit after the breaks through Kieran Dixon and Ryan Morgan, but Ash Handley’s 22nd try of the season gave Leeds a little more breathing space.
And with the game entering the closing stages, Walker’s second and a trademark scoot from Brad Dwyer wrapped up victory.
Next up for the Broncos is a crunch clash with fellow relegation candidates Hull KR, while Leeds host red-hot Salford next Friday.
Elsewhere in Super League
Wakefield Trinity 16-24 Wigan Warriors