Does this help ?

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Yes thank you. Just confirms I have yet another problem I need to deal with. My first toe dip into the water of RR ownership is going to be a short lived one at this rate.

Does anyone know how difficult it will be to replace this "Bank 2, Sensor 1" sensor? I had "Bank 1, Sensor 2" replaced about a month ago? That was showing large spikes in temp and causing a Restricted Performance warning.

Caution !,

I have other screenshots showing 100c.,

This one showing an active regen in progress....

If it is not actually causing you a problem, investigate more about what it is monitoring before changing it ??

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IIRC the bank 2 sensor is only for the second turbo and so only goes up on the very few occasions that the revs get over 2500
Mine has always read 100. (2011 tdv8) so don’t worry about it.

Boot it above 2500rpm and it should climb up in value  Gone to a good home: 2011 4.4 TDV8 Vogue SE Buckingham Blue with Ivory and clear glass = "Rory"
2025MY Defender D350 90 in Silicon Silver on coils
1974 Series 3 Lightweight = "Millie"
Many, many other Landies over the years
My preferred specialist: www.glenrands.co.uk
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An IIDTool will tell you if the sensor is broken but as Dr Rob infers the Bank 2, Sensor 1 is the sensor on the second turbo which only spins up when you boot the throttle. Usually it sits at 100°c as the default reading.
Why do you want to know this temperature? If you are gauging the DPF regen temps the most reliable and accurate temp sensor is Bank 1 Sensor 2 which will go up to 640°-660° on an active regen.
Even if the Bank 2 Sensor 1 sensor is broken i would not worry too much about it. I learned early not to fix things that weren't broken or important as it just gets expensive... for stuff you don't actually need. This model has so many sensors...

hope that's some help...

cheers