This is the new -improved design- oil ladder for the K-series engine.

It seems like the improved torsional rigidity is another step towards an engine which preserves the headgasket, rather then eating them!
If you want to stop headgasket failures, both Landrover and Rover advise to use the multi layer headgasket combined with this oil ladder. The combination seems to be your best bet!

Genuine X-Part (Rover) part.