By Kitty Waddell TRAINER Gavin Cromwell is taking no prisoners in this year’s Grand National, sending last year’s runner-up, Vanillier, back into the mix, alongside Cheltenham Festival winner Limerick Lace and Malina Girl. Commenting on Vanillier’s progress and his expectation of the gelding against the favourite, Lucinda Russell’s Corach Rambler, William Hill ambassador Cromwell said: “I think Vanillier has come forward since the Bobbyjo. This time of year, every year, he just improves. A bit of spring in the air and his fitness levels get better. “He’s gone up a little bit in the handicap si…