I wrote at length about this ride in another place, but for the moment can confirm that the term "whacky races" is not entirely inappropriate as a description.
If the weather's fine, as it was last year, then expect the route to be lined with cheering crowds offering encouragement not only to the cars but also to the cyclists, of whom there were a fair few contingents.
Many other interesting vehicles both two wheeled and four, ghost ride this pilgrimage as they are yet too young to enter officially - so you get to see classics of all sorts.
Pacing yourself against the old cars is exhilarating, and do-able on most parts of the terrain. Staying out of their way on the descents is advisable - given that the brake technology of the day is errr.... agricultural by today's standards.
Brighton itself is in festival mode for the day, with loads of associated events, including aerobatic displays by a couple of bi-planes.