The top river cruise company for British travellers is making a huge push to welcome new guests from Canada and the United States into 2020 and beyond. What's more, they've really recognized the significance of the solo travel market and have gone a step beyond some of their competitors in offering solo cabin / no single supplement cruise fares. They regularly offer up to 5 cabins on sailings at a solo travel fare - that means an ordinary cabin size but without sharing rather than a purpose built (smaller) stateroom. Perhaps more amazingly, they open up their ships several times a year for exclusive use by solo travellers. While I'm told it's a common question they receive, there is no fee payable which would permit double occupancy on their solo cruise dates! The biggest consideration I feel solo travellers should take away from Riviera's solo cruise dates is that they only have 88 cabins on their river cruise ships. That means the solo travel dates feature only you and up to 87 other guests - that's about as intimate an experience as you're going to find on the waters anywhere on the planet.