unions have reacted angrily to the decision by labour to sack junior shadow transport minister sam tarry. it was after he joined striking rail workers on a picket line. several labour mps have also criticised the move, saying mr tarry was right to be championing the rights of workers. we re joined now by our political correspondent iain watson. first of all, train strikes continue to be divisive for the labour party? that s right, or how they react to them. they ve called for the government to get involved, for a fair settlement for those who are on strike but the difficulty for keir starmer as this, he says he wants to form an alternative government to the conservatives, there should be negotiated pay settlements, you shouldn t have a official spokesmen for his party standing on picket lines. taking sides. so he has