Having finally grabbed a decent HD screenshot from the first episode of the Last Post I am led to suspect that most of the "VC10" is a CGI model rather than 2D photoshopping over an existing airframe. To me neither the nacelles nor the tailplane bullet look quite right, and the system air intake on the leading edge near the wing root looks both too narrow and too low. The lower fuselage panelling appears overemphasised and the window layout is strange - what is that gap just ahead of the wing? And the BOAC blue is not right, unless the producers were going for the Instagram look...
And with all the trouble they must have taken to model it, adding or failing to remove the FR probe is very strange!
But the programme, to be fair, seems pretty good so far!