Arron Banks issued a legal letter to Guy Verhofstadt last night ordering the European Parliament Brexit co-ordinator to retract a tweet accusing him of being a “Putin cheerleader”. Banks’s lawyers say the bizarre tweet from arch-Europhile Verhofstadt defames him and that Verhofstadt’s allegations “are false.” Verhofstadt also accused Nigel Farage, who Guido understands is thinking hard about his options in response. Tough claim for Verhofstadt to defend, he’ll surely have to retract…