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This shocking CCTV footage shows the moment a man attacked a female shop worker before robbing her premises.

The woman can be seen opening Banwell Antiques in Honiton, Devon, at 9am.

She walks through the doorway and goes to put the shop keys in her handbag - before a man suddenly lunges behind her.

The robber is seen grabbing the worker around the neck and hauling her around the shop floor.

He then ties the woman's hands behind her back and pushes her to the rear of the premises, out of the view of the front window.

Police say the robber took a "considerable" amount of jewellery in Saturday's raid, including diamond pendants, gold rings, bracelets and necklaces.

Detective Inspector Charlie Craig, of Devon and Cornwall Police, said the footage had been released as part of an "urgent" bid to track the robber.

"Although we have followed up a number of lines of inquiry, we still do not know who this man is," Mr Craig said.

"He may not live in Devon and Cornwall so we are urging people to share this footage with friends across the country, using social media, so we can find out who he is."

A dedicated team of officers are now involved in investigating the robbery, which happened when the woman was working alone.

She was not physically injured in the ordeal but has been left "very shaken up" and is being supported by police and her family.

The man is described as white, of slim build, unshaven with short dark hair and aged between 30 and 50 years old.

He was wearing a blue coat, blue denim jeans, black trainers and a beige coloured flat cap and carrying a blue rucksack and black holdall bag.

Det Sgt Mark Oldershaw added: "The victim's handbag was stolen during this incident so any information with regards to the disposal of this is also of significant interest."

Officers are also appealing to anyone who is approached and offered jewellery for sale to contact them.

The value of the items stolen has not yet been ascertained.

However, items taken include ring sets with diamonds and semi precious stones, an oval shaped black opal surrounded by diamonds and precious gem and diamond set pendants.

Anyone with information is asked to contact Devon and Cornwall Police on 101.