Travellers who paid around £3,300 to £3,700 each for a European river cruise this September found themselves spending a big chunk of their holiday on a coach instead. Extreme summer heat dropped water levels on the Danube, leaving ships unable to sail parts of the river — and Tui's booking terms mean those passengers are not entitled to their money back.

One passenger, Richard Pearson from Lincolnshire, flew to Budapest to board the Tui Isla only to discover the ship was stuck in Vienna. He and other guests were put up in a hotel he described as average, then bussed four hours to Vienna the next day. He calculates he lost 14 to 15 hours of the trip to coach travel, plus more time waiting around for transfers. He accepts the water levels were nobody's fault, but argues a cruise spent largely on a bus isn't the relaxing break he paid for — and he's chasing a partial refund.

Another couple, Sue Crosby and her husband, were told just days before their 14 September sailing that the itinerary had been reworked to include multiple coach sections. When they asked to cancel and get their £3,700 back, Tui said no. They went anyway, reluctantly.

Tui's position is straightforward: its booking terms state that if a river cruise can be completed with coach transfers, no refunds are due, and changes can happen before or during the trip. A spokesperson said the company reviews each affected sailing with its nautical partners, sent revised itineraries to the 14 and 21 September Isla departures before travel, and arranged coach transfers and hotel stays so passengers could still visit Budapest, Vienna and Bratislava. The operator apologised that some customers didn't get the river cruise experience they expected — but stopped short of offering compensation.

The wider picture is that low water has disrupted river cruise operators across Europe this summer, so this isn't a one-off Tui problem. It's a growing risk as heatwaves become more frequent on the Danube, Rhine and other major cruising rivers, particularly in late summer.

Why does this matter if you're dreaming of a river cruise? First, read the water-level clause before you book — many operators, not just Tui, reserve the right to swap sailing sections for coach transfers and treat the holiday as delivered. Second, consider travelling in spring or early summer rather than August or September, when rivers are typically lower. Third, if an itinerary is revised before departure, weigh up whether the coach-heavy version is worth the fare to you, because cancelling at that point is unlikely to get your money back. Travel insurance rarely covers this scenario either, since the trip technically goes ahead. River cruising can be a brilliant way to see central Europe, but the fine print matters more than most passengers realise.