How to do it A-Rosa River Cruises (0800 098 2968) offers a round-trip seven-night Danube Classics sailing from Passau. From £4,699 for a family of four including flights; departs July 31 2025.

Ukraine sparked hopes Tuesday for an increase in grain exports despite Russia's blockade of Black Sea ports, noting that ships had started to pass through an important mouth of the Danube river.