Sherlock actress Abbington, who pulled out of the BBC One show last year citing "personal reasons", later claimed she was subject to a "toxic environment" and "inappropriate, mean, nasty bullying".

In a statement, the broadcaster said: "We take any allegations of bullying and harassment very seriously and this review has taken time due to its complex nature and our desire to ensure a rigorous and robust process was undertaken.

"Strictly Come Dancing is a family show and we rightly expect very high standards. While competition can be tough, rigorous and demanding, we want the show to ultimately be a joyous and transformative experience. It is a great shame if this hasn't been the case for everyone who has appeared on the show.

"We have assessed the complaints and we have upheld some, but not all, of the complaints made. We want to apologise to Amanda Abbington and to thank her for coming forward and taking part. We know this would not have been an easy thing to do."

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