That's useful info Christopher.
I didn't know that the Jag Mk 10 had inboard brakes on the Rear
so that rules that car out as an example to compare Rear brake shields with other cars.
But it's still interesting that the Jag Mk 10 had no shields on the Front (presumably) but the Jag E-Type Series 3 did have them on the Front (according to Myton diagrams).
It's good to have confirmation that the Daimler V8 250 did not have shields on either axle - yet the Jag Mk 2 did have shields on the rear (according to Myton diagrams).
I have the SNG Barratt PDFs (for "Early", for E-Type 6-cyl, and for Mk2/V8) but, other than the E-Type S1 diagram showing handbrake mechanism, the SNG Barratt diagrams only show a disc and an exploded calliper - not the slightly more complete diagrams that Myton show.
Anyway yes, it's a bit strange as to why some cars have shields behind disc brakes, and some don't - right the way through from 50s/60s volume production cars to modern volume production cars - there is no logic to it.