By Sam Elliott-Gibbs Peaky Blinders star Paul Anderson has bit back at stabs that he is looking ‘dishevelled and exhausted’ as he outlined why he’s been struggling lately. The actor – best known for playing Arthur Shelby Jr. in the hit BBC series – was photographed looking far from his best last week and it led to more concerns for his health. He admitted possession of crack cocaine after police were called to Camden, north London on December 26. Last month, he accepted liability and accepted he had the class A drug, class B amphetamines and two class C prescription substances on his possessio…