Let's not jump to conclusions. Just because they're all British nationals from London doesn't mean they're all Muslim.
They are:
Male, 24, London resident of Borough of Camden, UK national
Male, 24, London resident of Borough of Westminster, UK national
Male, 25, London resident of Borough of Westminster, UK national
Male, 23, London resident of Borough of Westminster, UK national
Male, 24, London resident of Borough of Willesden, UK national