My Lords, one of the considerations of the kind referred to by the noble Lord, Lord Carlile, is, of course, a fairly familiar debate parallel to this one which is about the economic well-being of the United Kingdom. Many of the powers exercised by security services can be exercised to defend the United Kingdom from physical threat, but they can also be used to defend the economic well-being of the United Kingdom. I have always been worried about the potential growth of that term, not its actual use. It is very easy to think of things that perhaps ought not to attract intelligence activity but which affect the economic well-being of the United Kingdom. The achievement by a particular firm of a particular contract in competition with another firm is a simple example.
We have some experience of trying to deal with this, and to move to an even wider definition of United Kingdom interests seems to me to open the door to criminal cases being mounted with serious potential penalties in circumstances which Parliament will not have envisaged, except in this short debate, when the matter arises in real life. I can see the intelligence agencies being put at some disadvantage by there being a suspicion that they can do things to favour one group of people over another in the economic interests of the United Kingdom or, as in this case, in the wider interests of the United Kingdom. There is a problem, and I think it needs to be addressed by tighter wording.