In Great Britain, he started his career with Newcastle Diamonds in 1970.[5] He won the British League in 1973 with Reading Racers[6][7] finishing with the 5th highest average in the league. When Reading closed for a year he moved to the Hackney Hawks in 1974, finishing the season with the highest recorded average in the Hawks' history.[8]
He then rode for Oxford Rebels (photo) in 1975,[9] winning the Midland Cup and then moved with the team and the promoters Danny Dunton and Robert Dugard to become the White City Rebels in 1976.[10][11] Dag had been keen to ride at Oxford, a track he loved and was disappointed at the move to the London stadium in 1976.
On deciding not to return to England in 1977, White City were granted a 'Dag Lovaas (Rider Replacement)' facility for the entire season, in which they ended up as champions.