- Premium rate telephone lines, starting 0871 or 090. 30% of companies were using these numbers. Make sure you don't call Ryanair as it will cost you a whopping £1 per minute!
- Surcharges and booking fees being added to credit card payment (over 43% reported this happening to them). The report said airline passengers are paying out nearly £8million in credit and debit card surcharges every month, or £265,000 a day.
- Pre-selected boxes which a consumer needs to untick in order to avoid paying for things they don't want, including travel insurance and airport lounge access, as a fifth of firms used automatic opt-ins. (Legislation is going through the EU to ban this practice.)
Chris Gray, acting assistant editor of Which? Travel, said: "Consumers should always have a clear choice when it comes to adding an extra item to their purchase. Automatic opt-ins make such choices less than clear and we want to see travel companies stop using them."