The court heard that in several of the attacks one of the gang gained entry to the targeted shops purporting to be a customer. He then held the door open for his hammer and axe wielding accomplices who proceeded to smash the display cabinets and fill their bags with jewellery.
More top news
Police have released CCTV images of a car they want to find in connection to a fatal hit-and-run on Saturday morning.
The family of murdered teenager Jimmy Mizen have held a community event in his memory to raise money for the foundation in his name.
A drawing made for one of the famous paintings from the Victorian era - Flaming June - has been rediscovered after more than 100 years.