The British Fashion Council announced the shortlist for the prizes, which will be awarded on Dec. 4.
Montague was most recently ceo of Loewe.
The e-commerce firm unveiled enhancements to its Intellectual Property Protection platform.
The designer plans to show a collection of pared-down looks at Pitti as he rethinks his approach to fashion.
Erin O’Connor, Jade Parfitt, FKA Twigs, Edie Campbell and Ryan Lo were among the guests who attended.