My earlier weblink does not appear to work? Probably my mistake.
Go to
Movietone
Go to 'start searching the newsreel archives'
In the 'Search Story' box enter '77/90/2' and press enter.
You should be at the mute clip which shows a lot more unused footage of the pageant.
You don't have to register to find or play the clip. There is some fascinating additional footage of the display, but no more footage of the vc10 fly past.