All clothing and shoes available at Fenwick, Brent Cross, London NW3, where the sale is now on
Make-up: Katy Messer at Fenwick

Cathryn wears white peg-top trousers, now £19.90 and draped top, £16.90, both by Mango; gladiator sandals, £75, Bertie; white watch, model’s own; nude slouch bag, now £125, Jaeger