If we accept, as is likely, that the patches are orange Day-Glo Fablon, black and white images would be useful. I wonder if those panels under 890's jet pipe fairings extend spanwise under the wings?
I find it particularly interesting that the National marking and serial numbers on the fin seem to align with fuselage contour beneath. Normally they are near parallel with the leading edge/top of the fin's dorsal fillet. Her appearance at Farnborough in '55 illustrates this;
Courtesy RuthAS