True, but self-defense is not a valid reason for firearm owership in the UK, so any issues about immediate access in an emergency are circumvented. Plus American legal system =/= UK legal system. Also, this condition is only really enforceable because we have firearms licensing officers who come and check security personally and can refuse to grant a certificate to own a firearm if they are not satisfied of the storage condition. It's not clear cut what constitutes 'secure' in this context so a 'professional' is called upon to make the decision. It can also vary depending on local crime rate, general security of your house, number and type of firearms etc.