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Two moped muggers caught on CCTV robbing a mother of her £25,000 Rolex watch at knifepoint have been jailed for a total of 17 years and six months.
Thomas McDermott, 24, and George Fitzgerald, 17, raced through the streets of Chelsea, west London, looking for wealthy victims before jumping off their bikes and attacking Heather Mitchell.
CCTV played to Southwark Crown Court showed the mother's children watching in horror as she was dragged along the ground.
The thieves wrenched her Rolex Day-Date from her wrist after robbing a businessman of his Rolex Oyster Perpetual timepiece just days before.
Other shocking footage shows the gang, which included 20-year-old Hisham Tawfik, threaten people armed with a hammer and an ankle grinder.