Britain's slalom canoeist Lizzie Neave reached the kayak semi-finals with
the second fastest time in the K1 heats
at the Lee Valley White Water Centre.
The ex-World and European champion was fourth after the first run but improved by three seconds in the second.
Tim Baillie and Etienne Stott joined fellow Brits David Florence and Richard Hounslow in the C2 canoe semis.
BBC Sport summariser Helen Reeves on Baillie and Stott:
"They gave it everything, worked extremely hard and they're right to be chuffed with their performances. They were two pretty consistent runs. This year has been good for them. They both had operations last year and Etienne needed shoulder surgery after only two days on the course."
Baillie and Stott
finished fourth fastest, three places ahead
of Florence and Hounslow.
Spain's Maialen Chourraut, who secured back-to-back World Cup wins earlier this season, was quickest in the women's K1.
France's Gauthier Klauss and Matthieu Peche topped the C2 standings, one place ahead of Peter and Pavol Hochschorner.
The Slovak twins are bidding for their fourth consecutive gold in the event.
The semi-finals and final of the C2 and K1 categories are on Thursday.