By William Schomberg and Tom Bergin LONDON (Reuters) - Raghad al Sous braved bombings in Syria to keep studying at school before fleeing in 2013 to rejoin her mother, who had been granted refugee status in Britain. Two years after moving from Damascus to Huddersfield in **rthern England, the 19 year-old's plans for a well-paid career contrast with concerns among some Britons that migrants are a drag on the country's eco**my and public services. Britain this week said net migration levels hit a record high of 330,000 in the year to March as workers from other EU countries and from outside the bloc flocked to take up jobs.