Dates for the trials, where crews are able to simulate the race proper on the Championship Course, were announced on 17 November 2017.
Women Cambridge's women's trial took place on the Championship Course on 5 December, between the
Harry Potter-themed boats
Expecto Patronum and
Wingardium Leviosa. The CUWBC president Daphne Martschenko was unavailable through illness to participate in the race, which was umpired by Matthew Pinsent.
Wingardium Leviosa took the early lead but the crews were level by Barn Elms boathouse, before
Leviosa pulled half a length ahead by
Craven Cottage. Level once again as the crews passed
Harrods Furniture Depository,
Expecto Patronum made a push at
Hammersmith Bridge, handling the rough conditions better than their opponents. With a clear water advantage by
Chiswick Eyot,
Expecto Patronum passed the finish line two lengths ahead. Oxford's trial race was conducted on 21 January 2018, delayed from December through ill health of the rowers. The race was held in windy and wet conditions on the Tideway between
Great Typhoon and
Coursing River umpired by Pinsent.
Coursing River made the better start from the Surrey station before
Great Typhoon drew level, before taking advantage of the curve of the river and pulling ahead. An oar clash followed but a series of pushes from
Great Typhoon saw them take the lead and push away under
Barnes Bridge, to win by half a length.
Men Cambridge's men's trial took place on the Championship Course on 5 December, between the boats
Goblins and
Goons.
Goblins, starting from the Surrey station, took an early lead which they held until
Goons drew level, and then began to pull away, as the crews passed below Hammersmith Bridge.
Goblins responded, restored parity and then took the lead at the Bandstand. Despite each crew making a series of pushes,
Goblins held a half-length lead under Barnes Bridge and maintained the advantage to the finish line. The Oxford trial boats were named
Strong and
Stable, in
reference to the Tory manifesto for the
2017 general election. They raced against one another along the Championship Course on 6 December 2017, umpired by John Garrett.
Strong, starting from the Middlesex station, took an early lead and held a half-length advantage by the time the crews passed Craven Cottage. Garrett repeatedly warned both crews as they each infringed the racing line, and
Strong capitalised on the advantage of the bend to be almost a length ahead.
Stable fought back and were nearly level by the time they passed Harrods.
Strong reacted to pull half a length ahead by Chiswick Eyot, extending to clear water by the Bandstand, and a final push at Barnes Bridge ensured them a two-length victory. ==Build-up==