Federation · GBR
Great Britain & NI national best marks
Best mark per athlete by Great Britain & NI athletes in each event, compiled from the all-time lists we import. Derived national bests — not official national records (see note below).
24
Stored athletes
24
Distinct marks shown
Women's 400m
Derived 14 Sep 2026
| # | Athlete | Mark | Date | Venue | Age |
|---|---|---|---|---|---|
| 1 | Amber Anning | 49.29 | 9 Aug 2024 | — | — |
| 2 | Christine Ohuruogu | 49.41 | 12 Aug 2013 | — | — |
| 3 | Kathy Cook | 49.43 | 6 Aug 1984 | — | — |
| 4 | Katharine Merry | 49.59 | 11 Jun 2001 | — | — |
| 5 | Nicola Sanders | 49.65 | 29 Aug 2007 | — | — |
| 6 | Donna Fraser | 49.79 | 25 Sep 2000 | — | — |
| 7 | Yemi Mary John | 49.85 | 17 May 2026 | — | — |
| 8 | Laviai Nielsen | 49.87 | 20 Jul 2024 | — | — |
| 9 | Jodie Williams | 49.97 | 4 Aug 2021 | — | — |
| 10 | Emily Newnham | 50.32 | 18 Jul 2026 | — | — |
| 11 | Victoria Ohuruogu | 50.36 | 10 Jun 2023 | — | — |
| 12 | Phylis Smith | 50.40 | 3 Aug 1992 | — | — |
| 13 | Charlotte Henrich | 50.45 | 18 Jul 2026 | — | — |
| 14 | Perri Shakes-Drayton | 50.50 | 22 Jun 2013 | — | — |
| 15 | Lina Nielsen | 50.61 | 18 Jul 2026 | — | — |
| 16 | Michelle Scutt | 50.63 | 31 May 1982 | — | — |
| 17 | Allison Curbishley | 50.71 | 18 Sep 1998 | — | — |
| 18 | Joslyn Hoyte-Smith | 50.75 | 18 Jun 1982 | — | — |
| 19 | Amarachi Pipi | 50.81 | 20 Aug 2023 | — | — |
| 20 | Lee McConnell | 50.82 | 20 Sep 2002 | — | — |
| 21 | Anyika Onuora | 50.87 | 25 Aug 2015 | — | — |
| 22 | Lorraine Hanson | 50.93 | 26 Aug 1991 | — | — |
| 23 | Nicole Yeargin | 50.96 | 10 Jun 2021 | — | — |
| 24 | Linda Staines | 50.98 | 26 Aug 1991 | — | — |
One mark per athlete — the athlete's best while representing Great Britain & NI. Equal marks share a rank ("1=" style). An athlete with marks for two nations appears under each nation represented at the time (e.g. Obikwelu under Nigeria and Portugal).
About this derivation
These lists are derived from the marks in our database — including the complete legal all-time lists imported from alltime-athletics.com — grouped by the nation the athlete was representing at each mark. They are not official national records: federations ratify national records under their own eligibility rules, and some marks here may not qualify.