Headteachers have told MPs how families from Gypsy, Roma and Traveller backgrounds were “ very upset ” following comedian Jimmy Carr’s controversial comments about their communities.A clip from Carr’s Netflix special, His Dark Material, sparked a social media backlash when he joked about the horror of the Holocaust and “ six million Jewish lives being lost ” before making a remark about the deaths of thousands of gypsies at the hands of the Nazis as part of the punchline. Speaking at the Commons