In 1992, as curling awaited full medal status at the Winter Olympics, Lockhart was skip of the team selected to represent Great Britain in the demonstration event at the Albertville Games.

She started in the buzzing atmosphere that enveloped the Scottish Championships in Glasgow, where her team – largely inexperienced at the highest level apart from herself at skip – overcame Rhona Martin's rink in a three-match final to claim the right to represent Scotland at the World Championships in Bismarck, North Dakota, ahead of the newly famed Olympic gold medallists.

In the latter stages of the competition, despite what was at stake, she and her teammates Sheila Swan, Katriona Fairweather and Anne Laird jumped into an immediate frenzy of dancing every time a burst of pop music was played between ends.

In the wake of Lockhart's triumph, much was made of her disclosure that she had deliberately ensured that the stone she used for her last delivery in the final against Sweden was exactly the same one used by Rhona Martin to seal victory in Salt Lake City.

During the 2006 Winter Olympics in Turin, Lockhart played in every game up until the team's defeat to Norway, when as a result of poor performance she was replaced by Debbie Knox.