Place the beets in a medium size saucepan, cover with water and bring to the boil. Reduce the heat to low, cover and simmer until just tender (about 30 minutes). Drain and rinse under cold running water then peel and cut into matchsticks. Place in a large serving bowl along with the cabbage, capsicum and radishes. Set aside.
In a small bowl whisk together the olive oil, orange juice, lemon juice, sugar, celery salt, Tabasco ad salt and pepper to taste until blended. Pour the dressing over the vegetables and stir to coat. Taste and adjust seasonings.
Cover and refrigerate for at least 3 hours for best results.