As the motor industry prepares to celebrate its centenary, the 100th edition of Top Gear comes from the National Motor Museum at Beaulieu with William Woollard taking a nostalgic look at the joys and hazards of motoring over those years. It's also the 50th birthday of the driving test, and in that time it's changed very little. Frank Page asks if now, with more than 20 million licence holders on Britain's roads, the standards of 1935 are still good enough. He also takes to the road to test the Porsche 944 Turbo.