There are 42 swimming events scheduled at the London 2016 LEN European Aquatics Championships, 34 individual events and eight relays.
There are five swimming disciplines – freestyle, backstroke, breaststroke, butterfly and individual medley – while there are also relays in freestyle and the medley.
Distances swam in the pool range from 50m to 1500m and there are heats, semi-finals and finals for every individual event apart from the 400m, 800m and 1500m freestyle events and the 400m individual medley, which don’t have a semi-final.
In these events the eight fastest from the heats qualify for the final. In the other events, the 16 fastest swimmers from the heats progress to the semi-finals, then the first two finishers in each semi-final, plus the swimmers with the next four fastest times, progress to the final.
Nations are allowed to enter up to four athletes per individual event at the London 2016 LEN European Aquatics Championships but only two are allowed to progress out of the heats.
In the case where three swimmers from the same nation finish in a qualification place (semi-final and final), the fastest two will progress and the third will be replaced by the next highest ranked swimming
In the event of two or more swimmers posting the same time for 16th (semi-final) or eighth (final) place, a swim off will occur.