The key to understanding Miss Rainbow is ground. She absolutely thrives on normal conditions, winning 4 of her 12 races (a 33% win rate) when the track is playing standard. She clearly struggles in other circumstances, which explains why trainer Tracy Waggott has become choosy about where to run her. Waggott, based at Spennymoor in County Durham, has said she runs best on bottomless ground but has not really had ideal conditions since her early races last year—which is why the trainer will wait for the right surface rather than chase entries on ground that does not suit her. When William Pyle has ridden her, he has won 3 of 19 races together (a 16% win rate), slightly above her overall average, suggesting a decent working partnership.
At 7 furlongs to a mile, Miss Rainbow hits her stride, winning at 33% over that distance, though the sample is small. Her last win came at Catterick Bridge five weeks ago, and she typically races in Class 6—the lower tiers of British racing—where she wins roughly 1 in every 7 races. She is not a horse who will capture headlines, but at the right track, on the right day, with the right ground underfoot, she knows exactly what to do.
| Course | Races | Results | Last run | Win rate |
|---|---|---|---|---|
| Newcastle Galloping |
12 | 1 win, 1 second, 1 third, 9 other | 26 Jun | 8.3% |
| Catterick Bridge Sharp |
11 | 2 wins, 1 second, 5 thirds, 3 other | 8 Sep | 18.2% |
| Redcar Galloping |
7 | 1 third, 6 other | 30 Apr | 0% |
| Thirsk Galloping |
6 | 3 wins, 1 second, 2 other | 24 Jul | 50% |
| Carlisle Undulating |
3 | 1 second, 1 third, 1 other | 9 Jul | 0% |
| Ripon Sharp |
1 | 1 other | 29 May | 0% |
| Pontefract Undulating |
1 | 1 other | 7 Oct | 0% |
| Hamilton Park Sharp |
1 | 1 third | 17 Jul | 0% |