Fashion model Twiggy has pleaded with UK fashion designers to stop using fur on the catwalks of London Fashion Week after a new report uncovered “terrible and inhumane conditions” at fur farms.

“I am very sad that some designers are still using real fur when the fake alternatives are so effective and so easily obtainable,” said the model, who also fronts Marks and Spencer's advertising campaigns.

“Is it really worth this cruelty just for fashion’s sake? I don’t think so.”

Whilst fur farming is banned in the UK, the rising trend in fur has fuelled demand, with over 40% of fur now sourced from Finland.

A new undercover report called ‘Bloody Harvest’ from Animal Defenders International (ADI) has revealed “horrific conditions and cruelty” at these certified farms.

“This investigation is a wake-up call – it is no longer acceptable to ignore the suffering, and designers must take responsibility for the way that their fur is produced,” said ADI chief executive, Jan Creamer.

“Some in the fashion industry have chosen to close their eyes and hearts to the truth about fur production.”