and house builders were down. crest nicholson said its margins had been hit by higher costs and flat house prices. bp down after investors were pocketing profits following a strong run in the sector. that's all the business news for now. i'll be back in an hour. thanks, rachel. infact, we thanks, rachel. in fact, we will talk a bit more about one of those stories rachel touched on there. we're told that driverless cars will be the future of motoring — but how will they actually work? manufacturers are being warned that words like "autonomous" and "autopilot" are lulling some drivers into a false sense of security. motorists may think that they have self—driving cars when that's not actually the case, as our technology correspondent rory cellan—jones explains. so, the autopilot system is on... this is not a self—driving car, but the tesla has some features to automate the driving process, and car insurers are worried about how they're described. we've got something there called "autopilot". i think it's misleading — autopilot suggests, well, that means it's doing it itself.