could face delays tomorrow as three rail companies go on strike over the role of conductors. also, joni sledge dies at the age of 60. music: we are family by sister sledge. one of four sisters who made up the 70s disco group, sister sledge, she passed away at her home in arizona yesterday. good evening and welcome to bbc news. labour says it will fight for changes to the brexit bill when it comes back to the house of commons tomorrow. the brexit secretary david davis has called on mps to reject lords amendments and to give the prime minister a free hand in negotiations with the european union. if the bill is passed theresa may could trigger the formal process of brexit as early as tuesday. vicki young, our chief political correspondent, reports. theresa may wants to get on with it. for months she has vowed to kick start brexit talks by the end of march. but some here in parliament are fighting to get safeguards written into law before the negotiations begin. today, th