I discovered that the oil level was low, just days after getting my car - it was just above the minimum mark, meaning that it could take another 1 litre. Rather than the hassle of driving back to the dealer, I researched alternative oils to the Castrol Edge Professional oil recommended by Jaguar.
The oil for my D180 diesel is 0W-30. I found that Penrite oil ENVIRO+ C2 0W-30 (FULL SYN.) meets the Jaguar and Land Rover specifications for my car. I'm not sure if this oil is available in Europe,but I'm pretty sure that Penrite sell worldwide. The specifications are STJLR.03.5007 and STJLR.51.5122. Any oil that meets these, and is of the same viscosity should be fine.