Why do summer-weight white frills look out of place at an Irish autumn wedding? A children's fashion critic looks at the October flower girl, from low amber light and cool stone churches to castle steps and the afters. The verdict: deeper colourways, richer fabrics, proper sleeves and a layer chosen with as much care as the dress.

My autumn style edit for the tween junior bridesmaid at a September or October wedding: the jewel tones of the season, from cobalt and burgundy to emerald and deep red, plus why velvet and long sleeves work so well. You'll also find tips on tying her look into the bridal palette, styling for golden-hour photos at a country house or barn, and keeping it grown-up yet age-appropriate.