By Tom Masters & Benedict Tetzlaff-Deas A fraudster couple have been jailed after they were found to have stolen £250,000 from gym lockers and flaunted their lavish lifestyle online. Ashley Singh, 39, and Sophie Bruyea, 20, targeted 18 unsuspecting victims as they worked out at gymnasiums across London and the southeast in a year-long crime spree. They pair stole credit cards before maxing them out, and used them to pay for expensive holidays in Dubai and the Amalfi Coast in Italy. The couple also splashed cash at designer stores, including Prada, and bought a pedigree puppy. Bruyea’s Facebook…