Dawson went on the 1997 British Lions tour to South Africa as third-choice scrum half behind Rob Howley and Austin Healey but injury to Howley and some good performances saw him make the starting line-up. In the first test with ten minutes to go, Dawson broke from the base of a scrum and threw an overhead dummy that checked the four Springboks allowing him to scamper in for the winning try. That victory was the start of a 2–1 series win, clinched when he fed Jeremy Guscott for the series-winning drop goal.