“It’s also important that no-one feels pressured by misleading statements into making a booking.”That’s why we’re now demanding that sites think again about how they’re presenting information to their customers and make sure they’re complying with the law.”Our next step is to take any necessary action – including through the courts if needed – to ensure people get a fair deal.”The CMA has also sent warning letters to a range of sites demanding they review their terms and practices to make sure they are fair and comply with consumer protection law. It also raised concern about the fairness of discount claims made by the sites, such as comparisons with higher prices that were only offered for a brief time.It comes after Which? revealed that customers were being hit with unexpected fees after booking holidays and hotels via small websites found through Skyscanner. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. Hotel booking sites use pressure tactics to encourage people to book quickly Credit:Telegraph The CMA said it believed the sites could be breaking consumer protection law. The watchdog has referred a number of concerns around online hotel booking sites’ price guarantees and other price promises to the Advertising Standards Authority (ASA), and has asked the ASA to consider whether statements like “best price guarantee” or “lowest price” mislead customers. Andrea Coscelli, CMA chief executive, said: “Holidaymakers must feel sure they’re getting the deal they expected, whether that’s securing the discount promised or receiving reliable information about availability of rooms. Hotel booking websites have been told to stop “one room left” warnings designed to pressure holidaymakers into booking, under a crackdown by competition watchdogs.Such warnings are currently used by the UK’s most popular booking sites including Expedia and Booking.com to encourage customers to book sooner rather than later.Following an investigation into holiday booking sites the Competition and Markets Authority said it would take firms to court if they did not end unfair and misleading practices.The watchdog said it had “widespread” concerns about a number of sites, which it has declined to name, including the role commission paid by hotels could influence their rankings and the extent to which they included all costs in the upfront price or introduced them later in the booking.–– ADVERTISEMENT ––Pressure selling, involving claims about how many people were looking at the same room, how many rooms were left or how long a deal would be available, could also create a false impression of availability or rush consumers into making a decision, the CMA said.