In recent months, Kate, 43, has been seen in similar pieces, pairing brown and grey heritage fabrics with relaxed shirting and slim-cut trousers for a polished yet practical aesthetic.

By choosing a jacket steeped in tradition, Eugenie subtly nodded to this enduring royal fashion formula – one that celebrates craftsmanship and  British design.

Finishing the ensemble with delicate gold earrings and natural makeup, the Princess struck the perfect balance between classic and contemporary.

Also in attendance was Lauren Silverman, Simon Cowell’s partner, who opted for a far more trend-led look. 

Silverman’s outfit exuded country chic, pairing sharp tailoring with a contemporary twist that felt distinctly off-duty glamour. 

Her chocolate-toned blazer layered over a crisp blouse and dark trousers created a striking contrast to Eugenie’s country-inspired ensemble, proving that the modern woman can interpret British style in countless ways.

Where Eugenie channelled classic heritage sophistication, Silverman leaned into runway-ready refinement, adding oversized sunglasses and sleek accessories for a touch of Hollywood glamour. 

It was a reminder that while the royals favour timeless elegance, celebrity counterparts like Silverman bring a bolder, fashion-forward energy to the same social circuit.

The pair were among a star-studded guest list that included Jeremy Clarkson, who was seen chatting animatedly with guests during the fundraiser – a fittingly glamorous event that blended philanthropy, style, and star power in equal measure.