I'm searching for an example where there is terrain that extends through the TA into the Flight Levels, and which would make a re-calculation of that terrain altitude to its corresponding FL necessary to stay safe. Does anyone know of such an example?
Plenty around the world. None in the UK
AFAIK.
Don't have a chart to hand, but as in UK airspace the transition altitude outside CAS is 3000', doesn't that make a lot of Scotland (outwith the Scottish TMA and Aberdeen CTR/CTA), bits of the Lake district and possibly Wales fit the bill. As for calculating altitude-FL's, isn't that why we have two altimeters in situations when we can't see the ground coming.