Last updated: 26 July 2023.
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Male
| Event | Name | Time | Date | Competition | Venue |
|---|---|---|---|---|---|
| 50m Freestyle | James Harrison | 00:23.92 | 12/7/2009 | European Junior Championships | Prague |
| 100m Freestyle | James Harrison | 00:51.59 | 19/03/2009 | British Championships | Sheffield |
| 200m Freestyle | Martin Webster | 01:54.32 | 11/04/2002 | British Championships | Manchester |
| 400m Freestyle | Liam Smith | 04:01.30 | 28/07/2003 | European Youth Olympic Festival | Paris |
| 800m Freestyle | Stephen Waterhouse | 08:32.20 | 29/07/2007 | National Youth Championships | Sheffield |
| 1500m Freestyle | Liam Smith | 16:02.03 | 19/03/2003 | British Championships | Sheffield |
| 50m Backstroke | Danny Hall | 00:28.50 | 10/05/2015 | ASANER Championships | Sunderland |
| 100m Backstroke | Myles Stirk | 00:58.74 | 27/07/2016 | British Summer Championships | Sheffield |
| 200m Backstroke | Danny Hall | 02:05.06 | 16/04/2015 | British Championships | London |
| 50m Breaststroke | Jonathan Milner | 00:30.06 | 26/07/2017 | British Summer Championships | Sheffield |
| 100m Breaststroke | Jonathan Milner | 01:05.72 | 25/07/2017 | British Summer Championships | Sheffield |
| 200m Breaststroke | Jonathan Milner | 02:24.40 | 02/03/2018 | British Championships | Edinburgh |
| 50m Butterfly | Jonathan Milner | 00:26.22 | 14/04/2018 | Co Leeds NQ Meet | Leeds |
| 100m Butterfly | Jonathan Milner | 00:57.04 | 15/04/2018 | Co Leeds NQ Meet | Leeds |
| 200m Butterfly | Ryan Flanagan | 02:05.86 | 29/07/2011 | British Summer Championships | Sheffield |
| 200m Individual Medley | Ryan Flanagan | 02:07.40 | 29/07/2011 | British Summer Championships | Sheffield |
| 400m Individual Medley | Ryan Webster | 04:33.53 | 09/08/2002 | ASA National Youth Champs | Sheffield |
Female
| Event | Name | Time | Date | Competition | Venue | |
|---|---|---|---|---|---|---|
| 50m Freestyle | Linda Shaw | 00:26.66 | 04/08/2013 | National Youth Championships | Sheffield | |
| 100m Freestyle | Georgia Coates | 00:56.24 | 26/08/2015 | World Junior Championships | Singapore | |
| 200m Freestyle | Georgia Coates | 02:00.16 | 28/07/2015 | British Summer Championships | Sheffield | |
| 400m Freestyle | Anna Bochmann | 04:10.99 | 04/08/2010 | British Gas Youth Champs | Sheffield | |
| 800m Freestyle | Danielle Hall-Jackson | 08:39.30 | 29/07/2011 | National Youth Championships | Sheffield | |
| 1500m Freestyle | Danielle Hall-Jackson | 16:34.84 | 06/03/2011 | British Championships | Manchester | |
| 50m Backstroke | Sophie Hobbah | 00:30.10 | 28/07/2018 | British Summer Championships | Sheffield | |
| 100m Backstroke | Sophie Hobbah | 01:03.48 | 30/06/2018 | Scottish National Championships | Glasgow | |
| 200m Backstroke | Sophie Hobbah | 02:12.40 | 27/07/2018 | British Summer Championships | Sheffield | |
| 50m Breaststroke | Sophie Taylor | 00:31.72 | 04/07/2012 | European Junior Championships | Antwerp | |
| 100m Breaststroke | Sophie Taylor | 01:09.36 | 19/01/2013 | Flanders Cup | Antwerp | |
| 200m Breaststroke | Georgia Coates | 02:26.42 | BR | 30/08/2015 | World Junior Championships | Singapore |
| 50m Butterfly | Isabelle Goodwin | 00:27.05 | 09/07/2021 | European Junior Championships | Rome | |
| 100m Butterfly | Ciara Schlosshan | 01:00.16 | 13/12/2017 | SE Winter Championships | Sheffield | |
| 200m Butterfly | Ciara Schlosshan | 02:11.18 | 05/07/2018 | European Junior Championships | Helsinki | |
| 200m Individual Medley | Georgia Coates | 02:12.74 | 28/08/2015 | World Junior Championships | Singapore | |
| 400m Individual Medley | Georgia Coates | 04:39.94 | BR | 25/08/2015 | World Junior Championships | Singapore |