The Marquess of Blandford was part of a four-man boat that completed a 3,000-mile row.
London 2012 gold medallist Katherine Copeland says she has lived a "dream" as she retires from rowing.
Two-time Olympic gold medallist Helen Glover says it is "highly unlikely" she will compete at the 2020 Games.
Anna Thornton was left in a coma after falling down stairs in Seattle last month.
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Researchers believe Robin Buttery's condition improved after the 3,600-mile challenge.