A recent sale by Phil-Comics (check them out here) had this intriguing item up for sale. It's a piece of original comic art for a comic strip very much in the Eagle mould - the artboard used is the same as a Dan Dare artboard I have, the instructions at the bottom of the art are also the same. However, the story seems never to have been published.
Googling 'Pryde' and 'comics' just brings you up a lot of references to Kitty Pryde of the X-Men.
I'm not an expert on Kearon but his work seems to have been exclusively in black & white - so this is a rare chance to see his colour work.
Here's a Robot Archie page by Kearon - I think the hairstyles of the characters is very similar (as well as the figure work generally).
The page recently sold for £62 - the seller was phil-comics and the art had previously been the property of renowned comics artist Jim Baikie.
UPDATED: friend of the blog Jeremy Briggs points out that the plane is an Airspeed Oxford used by the RAF during WWII and into the 1950s as a bomber trainer so it would have been contemporary with early Eagle and Swift.