Thick fog covering most of south east England left flights delayed and cancelled this morning, while others have been hit by problems over the past week. If you've been affected, here's a round-up of your rights.
Weather forecasters are warning of major travel disruptions over the coming days, so consumers should know their refund and compensation rights in case of problems.
Dozens of the UK's largest online stores have been warned to bring their websites up to scratch so they comply with consumer protection laws, or face action.