Limekiln Ziggy (T4) leads the field on raw speed (rank 1, rating 54) and shares the composite top rank alongside T3 Rheas Choice at 38. The performance average of 37 is the field joint-highest, and recent form — rated P42, P39, P41 across the last three runs — shows a steady improving pattern rather than a dog on the slide. The class drop from D1 into D2 company means Limekiln Ziggy is likely faster out of the boxes than much of this field, and the T4 draw avoids both the wide penalty and the rail-crowding risk. Speed Rank 1 wins 23.28% at Towcester 270m across 98,284 runs — the strongest individual signal at this distance. The composite co-rank provides corroborating evidence rather than the swing factor.