The vessels that took part included military, commercial, and pleasure craft. According to Guinness World Records, this was the largest ever parade of boats, surpassing the previous record of 327 vessels set in Bremerhaven, Germany, in 2011. Sailing vessels and others too tall to pass under the bridges were moored as an “Avenue of Sail” downstream of London Bridge with smaller craft in St Katherine Docks.
British media organisations estimated that one million spectators watched from the banks of the Thames, while media personalities in the US loosely used the term “tens of thousands” to describe what they were seeing. The pageant was broadcast live by the BBC and Sky News and subsequently broadcast around the world on other networks. More than 10 million tuned into the BBC’s four and a half hour coverage, with an audience average of 10.3 million.