former royal marine bobby burnett beat his girlfriend and banned her from wearing revealing clothes in a two-year-long campaign of terror .
the 30-year-old installed a tracker app on her smartphone and brutally attacked her when she visited him at the commando training centre at lympstone , devon , and at her home .
his violence and the stress of his controlling behaviour led her to have two miscarriages , one of which happened days after he punched her in the stomach when she was ten weeks pregnant .
burnett was a marine with an exemplary service record who has been thrown out of the corps .