Luxury fashion brand Gucci has announced a series of measures in response to accusations from former employees that its Shenzhen store was operated like a “sweatshop”.

The reaction follows an open letter in which ex-workers reported having to work overtime without adequate compensation, and having to get permission to go to the bathroom or have a drink of water, as well as carrying out inventory checks into the early hours of the morning.

Gucci, which is owned by luxury goods powerhouse PPR, said it had been “closely monitoring” the reports and “does not and will not endorse or tolerate” the alleged maltreatment.

The company said it had investigated the reports and outlined a series of measures, including the replacement of senior staff; the establishment of a confidential communications channel between management and staff; and improved management training.

It added: “Furthermore, Gucci has proactively engaged external consultants to conduct a comprehensive review to support ongoing actions that can enhance our organisational structure, the welfare and training of our people, talent recruitment and retention, and other business practices in China.”