I am not a cyber expert by any means, but I am certainly.... It's very different from other kinds of defence and security issues. Many of those other things take five, ten, or fifteen years from the time we first identify them as a potential threat to the need to respond to them.
Cyber is something that is a continual evolution. For every measure you undertake, a countermeasure can readily be developed to respond to it. I think it's the kind of thing that requires an enormous and/or costly continuous effort to respond to.
I don't know that there's any obvious basis for a much closer coordination with the Americans on this. We have clearly started out on separate tracks, and there are good reasons to maintain a separate approach, but there are probably plenty of ways in which there could be ad hoc cooperation, where you'd know about the potential for a certain kind of attack and if there's a way to even model your response on what the Americans do or at least share intelligence about that kind of thing.