In Qatar, a "British" school may not necessarily be British. The best ones will be well-known to QL, though. Why is an exit permit needed? Because it's the law! You will need an exit permit for every vacation, trip etc. Some employers give them easily. Other expats haven't been out of the country for two years. You must read your contract carefully and get independent verification - some employers will not let you out of your contract until you pay back all expenses involved in your recruitment, etc.
In Qatar, a "British" school may not necessarily be British. The best ones will be well-known to QL, though. Why is an exit permit needed? Because it's the law! You will need an exit permit for every vacation, trip etc. Some employers give them easily. Other expats haven't been out of the country for two years. You must read your contract carefully and get independent verification - some employers will not let you out of your contract until you pay back all expenses involved in your recruitment, etc.