Majik and SHADO!
How many super-secret gov't agencies are there out there to spy on the aliens on Earth?! (Oh, and B39, but they're not there to spy as much as destroy). I love that it was SHADO that emptied the warehouse out from under Trask instead of Trask himself.
If SHADO knew what Trask was up to (throwing L&C from the plane), why didn't they stop it... of course, that's the next part isn't it?