No disrespect intended but it sounds like you are new to the wonderful world of Land Rover?
If the noise is only there on early cold morning starts I would worry about it too much, especially as it is not apparent if you depress the clutch. Incidentally, on early morning starts, you will help your engine if you depress and hold the clutch whilst starting the engine - release it once the engine has started.
It sounds like you have a slightly worn clutch thrust bearing, but cars will run for ages before giving you a problem - normally.
I only point this out as it is not a small job to replace this item as the gearbox and engine must be separated, which takes man-hours. Also, it is prudent to replace the whole clutch whilst the 2 are separated - quality clutch kits cost about £85 so that's not too bad but the labour charges will not be cheap.
Good luck
Dave