Well, we can all rest assured that if Gordon Brown does leave office in the near future, on the basis of being not only utterly incompetent but also incredibly damaging to this country, that he won't be working for the security services.

This is because one of their criteria for working for them is:

Those who wish to overthrow or undermine parliamentary democracy by political, industrial or violent means;

Which, come to think of it, means that no one who agrees with the EU can work for them.
Although I suspect they may consider that UKIP are more threatening than the bastards who are supposed to govern us.

Not only that, but:

Individuals whose reliability is in doubt because:

they may be susceptible to pressure or improper influence;

they have shown dishonesty or lack of integrity;

they have demonstrated behaviour or are subject to personal circumstances which indicate unreliability.

So that rules them out again, then. And some chap on a motorbike, and some chap who works in HMRC...