They will resume at 5pm - a clear indication that some real progress has been made. At one point negotiators sent out for fish and chips. A third union, the GMB, which has said it will press ahead with a strike ballot among check-in and ground staff at both Heathrow and Gatwick, was not present, but this was thought to be because of a misunderstanding. It is expected the union will attend tonight's talks. Amicus has also said it will ballot Heathrow members but the T&G said it will wait pending the outcome of the Acas negotiations.