The Scalextric4Schools web site has lost the links so here are the key documents.
Order form for parts and track from Hornby
PTC Creo modelling tutorial
Make - assemble - setup guide
PTC Creo model for the tutorial car with Inline motor
PTC Creo model for sidewinder motor - Note: The latest kits I have seen have the rear axle for this layout
Thank you Tim for posting all the information.
PTC is working on updating the web page.
I let you know when it's ready.