Work permit holders make up about a quarter of the total population here, yet are still largely seen as outsiders. Experts say it is important to re-examine Singaporeans' relationship with migrant workers. Like many in Singapore, 37-year-old Ella Lyn would spend her days off indulging in a hobby, namely rollerblading with friends. What’s unique about Ms Lyn’s experience is that her fellow rollerbladers are made up mostly of migrant workers – though not entirely by choice. The domestic helper