Being cynical for a minute - surely the response from the Gov. will be to quote the laws we already know about, therefore providing the clarification asked for...
The real issue here is one of deterrent. By making life difficult for ordinary people the hope is to also deter the bad guys. Does that work? Probably to a limited degree. After all it's not hard to work out that walking around as a happy snappy tourist with a decent P&S will give great results without the hassle. So remove the restrictions would seem sensible - of course then Mr Terrorist can walk around with his DSLR, lenses and tripod and getter better results but at least the general public will be able to enjoy a peaceful existence without the hassle...