1. 400-meter Freestyle (Long Course): Adlington set the world record in the women's 400-meter freestyle with a time of 4:00.63 at the 2008 Summer Olympics in Beijing, China.
2. 800-meter Freestyle (Long Course): She broke the world record in the women's 800-meter freestyle twice. First, she set the record with a time of 8:14.10 at the 2008 British Swimming Championships in Sheffield, UK. Later, she lowered the record even further to 8:11.02 at the 2008 Summer Olympics in Beijing, China.
3. 400-meter Freestyle (Short Course): Adlington also set the world record in the women's 400-meter freestyle in short course (25-meter pool) with a time of 3:59.03 at the 2008 European Short Course Swimming Championships in Rijeka, Croatia.
It is important to note that swimming world records can be broken and updated over time by different athletes. Rebecca Adlington's records might have been surpassed by other swimmers in subsequent competitions. You may want to check official sources for the most current world records in swimming.