Lanvin has lost dozens of key talent and staff in recent weeks. They are jumping ship from every department, from the couture workshop to finance, and joining rivals such as Hermès, Dior and Chanel, several informed sources told Miss Tweed. Many employees have lost faith in the ability of Lanvin’s Chinese owners to turn it round and make France’s oldest fashion brand profitable and relevant again. Even the head of its historic boutique in Paris resigned last month to run the flagship of another luxury brand in London.