By Jennie Buzaglo Emmerdale star Lawrence Robb has announced a new project away from the ITV soap opera. The actor, 32 – who plays Mackenzie Boyd on the ITV show – has shared his “crazy” decision to take part in the London Marathon later this year. Lawrence has revealed that he will be raising money for the charity Samaritans, which aims to provide support to those in emotional distress or at risk of taking their own life. Lawrence announced in participation in the upcoming marathon, which will be held in April, in an Instagram video, where he was seen holding his dog. The actor spoke directly…