M25 Racer is the original name for the the Davilex UK game London Racer. Davilex made a patch for London Racer but didn't make one for M25 Racer. I figured one out with their help (in 2005!), as the main bug was caused by .ini files having semi-colons in them, which needed replacing with commas! I've packaged the .ini files with the spel.dat from their London Racer patch, and the original game will now work (tested on XP and Win8.1 64bit).

Here's how to install it:

1. Install the game.
2. Copy the contents of the attached zip file into the game folder, overwriting the files in there.
3. Set WinXP (or earlier) compatibility mode on the M25 Racer shortcut (otherwise you'll often lose the game window behind the menu window, plus the music won't play). You can also set the game to run 640x480 resolution in the compatibility settings, otherwise the menu will be small in the middle of the screen.

Note: I did notice the frame rate goes up and down (quite jerky sometimes). It didn't do this on my old WinXP machine, so it might be a modern graphics driver bug (Nvidia probably!).