Miss L Costello

The more interesting number is what happens when the ground turns soft and wet. In those conditions, Costello has won 1 from 7 races — around 1 in every 7 — which is a meaningfully better record than her overall figures suggest. That kind of split tells you something worth paying attention to: she handles a horse differently when the going gets tough underfoot, and trainers who run horses on wet days would do well to keep her name in mind.

Four years into a riding career is still early enough that the overall statistics are little more than a starting point. The question is whether the soft-ground form is a genuine strength she can build on, or simply a small sample that flatters. Either way, Costello is a jockey whose best moments tend to arrive when conditions are at their most demanding — and that, at least, is an interesting thing to be known for.