The 24 hour Time Trial has the exact opposite situation. Most of those aspiring to race will have support vehicles, either scattered around the course, or perhaps even following (they will have rules governing how that's done). And then there are the Audaxers, some of whom will be entirely self-supported, using the bag-drop facilities for lights and bottles, and popping into the Raven for café stops through the night. It's obviously a race for some, but for others, the aim is to just finish with as many AUK points as you had set your sights on. It all ends in a dead heat of course, everyone finishing in the same time.