Unfortunately I've had a coolant loss that has been nearly impossible to track down after replacing the timing belt and water pump. The motor has been running smoothly with plenty of power, no white smoke from the exhaust and there has been no coolant loss or exhaust smell when the expansion tank cap is off so I believe this would rule out a head gasket. Also there is no odor of coolant coming from the heater which would indicate there is not a coolant leak in the heater box. I sprung a leak in the radiator when refilling the coolant system after the timing belt and water pump replacement. This can probably attributed to an old radiator which had debris loosen up after flushing the system. I patched the leak pretty half-assed and believe this may be causing a partial blockage which is leading to coolant loss through of the overflow. I have purchased some of the green UV dye to check for any leaks as I haven't been able to find any otherwise. I've also attached a plastic bottle to the overflow tube to collect any coolant that may be pushing out due to the partial blockage. The heater has been pumping out warm air and it has been running a little warmer, although not overheating, since this condition started which leads me to believe the blockage is only partial. I think I may replace the radiator regardless as it is relatively inexpensive and the current one is not in the best shape. Any other suggestions on what to check would be appreciated.
Aside from this issue, I have gotten my storage setup finalized with the purchase of another Pelican case. I had previously been using a duffel bag however, as all Defender owners know, these vehicles do leak. This kind of led to a messy situation with the duffel bags and this setup has proven much better.
After the coolant issue is taken care of, I hope to get out on the trails as it's been something I have been needing to do.