after almost three-quarters of the course had been rowed, the race was halted for over 30 minutes when a lone protester, Australian Trenton Oldfield, entered the water from Chiswick Eyot and deliberately swam between the boats near Chiswick Pier with the intention of protesting against spending cuts, and what he saw as the erosion of civil liberties and a growing culture of elitism within British society. Once he was spotted by assistant umpire Sir Matthew Pinsent, both boats were required to stop for safety reasons. Once restarted, the boats clashed and the oar of Oxford crewman Hanno Wienhausen was broken in half with the blade snapped off. The race umpire John Garrett judged the clash to be Oxford's fault and allowed the race to continue. Cambridge quickly took the lead and went on to win the race. The Oxford crew entered a final appeal to the umpire which was quickly rejected; and Cambridge were confirmed as winners in the first race since 1849 that a crew had won the boat race without an official recorded winning time. After the end of the race Oxford's bow man, Alex Woods, received emergency treatment after collapsing in the boat from exhaustion. Because of the circumstances, the post-race celebrations by the winning Cambridge crew were unusually muted and the planned award ceremony was cancelled. 2020 cancellation Like other sports events, the 2020 boat race was cancelled because of the COVID-19 pandemic. 2021 relocation The 2021 races were held on the Great Ouse at Ely in Cambridgeshire, over a shorter straight course of . This was due to the safety issues of Hammersmith Bridge, as well as restrictions due to the COVID-19 pandemic still being in force. The 2022 Boat Race returned to the Thames and the traditional course between Putney and Mortlake. Sinkings In the 1912 race, run in extremely poor weather and high winds, both crews sank. Oxford rowed into a significant early lead, but began taking on water, and made for the bank shortly after passing Hammersmith Bridge to empty the boat out: although they attempted to restart, the race was abandoned at this point because Cambridge had also sunk while passing the Harrods Depository. Cambridge also sank in 1859 and in 1978, while Oxford did so in 1925, and again in 1951; the 1951 race was re-rowed on the following Monday. In 1984 the Cambridge boat sank after colliding with a