Three design concepts were considered for MGF: PR1, PR2 and PR3. PR3, the mid-engine, rear wheel drive version was the layout that would be chosen.

Once the design was chosen, the next step was to test the running gear. A number of engineering 'mules' were built. Each had to be disguised but perhaps the most elaborate was this Metro van, or at least that is what it looks like.

Looking like a well-used delivery vehicle, wide wheels and non-standard wheel arches indicate it is no ordinary van, and underneath the rear section are the mechanics of the mid-engined MGF. Able to run on the road and test many MGF miles, it was rarely given a second look.