From 1943, the BBC Polish Service had been broadcasting about the exterminations but the BBC Hungarian Service had not mentioned Jews. After the German invasion in March 1944, the Hungarian Service did broadcast warnings but by then it was too late. According to David Cesarani and Götz Aly, although Jews who survived the deportations claimed that they had not been informed by their leaders, that no one had told them, there is plenty of evidence that Hungarian Jews could have known.