I think out of all designers, Ray Stenning being an enthusiast and understanding the different body designs on both trains and buses, made sure the livery was adapted correctly for the HST and not a'botched' 91 job.
I beg to differ, and instead agree with
XCTurbostar on this one. None of the three BR era liveries applied to the HSTs (which are popularly held to have been well designed) cut the lower front skirt in two aesthetically, or ran light colours over the bodyside radiator grille as this area is prone to dirt build up (In fact, on the VTEC livery this is even more incongruous as the radiator grille
is painted black and the white sweep runs slap bang into it): BR did paint over the lower sections of the radiator grille in warning yellow on the first couple of Intercity Executive repaints, but then very quickly and sensibly reverted to incorporating into the livery a broad diagonal band of a dark colour (previously rail blue, then falcon grey) across this area.
This looks very much like "a bodge of the 91s livery" in my opinion.