Having done some further testing and measuring, I can reliably achieve 110uA, close enough for me. This is only when running on battery. I can also confirm that when on battery the power led is off, so there was no need to do that step either.
However, to achieve this you need deep sleep, the clocks need to be off and this is playing havoc with my code. Functions like millis don’t work anymore, i think there may be an issue in the LoRa comms stuff too as it regularly stops, interrupts also only work on high and low, no edge triggering.