Difference being that they have to take the girls out of the UK to get them married somewhere such things are legal. If the girl is smart and brave enough to get away and make it to a British Consulate or Embassy, they will take her in and get her back to the UK, where her marriage will be deemed invalid. I need hardly add that any remaining daughters will likely be taken from their parents!

Also, Immigration staff at airports are likely to single out Muslim families with young girls heading for Islamic countries. and take the girls aside to question them.