| Equestrian |
1993 European Eventing Championships |
Achselschwang |
 GER |
Individual eventing, Open |
🥈 |
 GBR |
as Kristina Gifford |
| Equestrian |
1994 World Equestrian Games |
Den Haag |
 NED |
Team eventing, Open |
🥇 |
GBR |
as Kristina Gifford |
| Equestrian |
1995 European Eventing Championships |
Pratoni del Vivaro |
 ITA |
Team eventing, Open |
🥇 |
GBR |
as Kristina Gifford |
| Equestrian |
1997 European Eventing Championships |
Burghley |
GBR |
Individual eventing, Open |
🥉 |
GBR |
as Kristina Gifford |
| Equestrian |
1999 European Eventing Championships |
Luhmühlen |
GER |
Team eventing, Open |
🥇 |
GBR |
as Kristina Gifford |
| Equestrian |
2009 European Eventing Championships |
Fontainebleau |
 FRA |
Individual eventing, Open |
🥇 |
GBR |
|
| Equestrian |
2009 European Eventing Championships |
Fontainebleau |
FRA |
Team eventing, Open |
🥇 |
GBR |
|
| Equestrian |
2010 World Equestrian Games |
Lexington, Kentucky |
 USA |
Team eventing, Open |
🥇 |
GBR |
|
| Equestrian |
2014 World Equestrian Games |
Caen / Mont Saint-Michel / Le Pin / Deauville / Saint-Lô |
FRA |
Team eventing, Open |
🥈 |
GBR |
|
| Equestrian |
2017 European Eventing Championships |
Strzegom |
 POL |
Team eventing, Open |
🥇 |
GBR |
|
| Equestrian |
2019 European Eventing Championships |
Luhmühlen |
GER |
Team eventing, Open |
🥈 |
GBR |
|