Shocking CCTV footage shows the moment a yob mugs an elderly lady of £80 cash. The 90-year-old had withdrawn money outside the Nisa Local Newsbox Express in Gravesend when she was targetted. She’d taken £100 out to pay her cleaner and get some groceries from the corner shop. Store owner Chelan Patel said: “She’s a regular customer and was drawing money outside at the cashpoint before she came in. “The man came behind her on a bike before propping it up against the shop front. “He waited for her to withdraw the money and as she went to walk into the shop with it in her hand he snatched it and r…