Expedia and trivago are among six online hotel booking sites that will make changes to end misleading sales tactics and hidden charges after a probe by the competition watchdog. Booking.com, Agoda, Hotels.com and ebookers were also investigated by the Competition and Markets Authority (CMA) after it raised "serious concerns" over tactics used in the sector. Report by Khanomh. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn