OK, so I've got a Disco 2 facelift, but the theory is still the same.
I've replaced the following with LEDs:
Rear stop/tail - red canbus 6/21 watt 380 equivalent
High level stop - red canbus 21 watt 382 equivalent
Rear fogs - red canbus 21 watt 382 equivalent
Reversing - white canbus cree LEDs 382 equivalent
Number plate - 2x white canbus 38mm festoon equivalent
Front side lights - white 6 watt 501 capless wedge equivalent
Internal courtesy and glove box - white canbus 38mm festoon equivalent
Currently I have retained the standard filament bulbs in the indicators due to the timing problems if LEDs are used in an unmodified circuit. I do have the resistors and yellow LEDs ready to install when I get around to it. The canbus system is (I believe, but I could be wrong) an electronic error detection system, not a current measuring system, consequently a parallel resistor is required to maintain the correct flash rate unless a proper LED flasher unit is fitted.
The only problem I found with the stop/tail lights was one of leakage of current causing incorrect operation. This was corrected by installing "current steering" diodes.
The headlights I have retained the 55 watt filament bulbs, but installed Osram Nightbreakers for both dipped and main beams and also in the additional driving lights and fog lights.
I have used LEDs of the same colour as the lens because I have noticed that a white LED can have a slight blue tinge which can in some cases make a red lens show a sort of purplish light, and if a lens does get cracked for some reason the light will still show the correct colour.
All of the LEDs were purchased from various sellers on that (in)famous auction website.