Deal with the journo as you will, personally I'd leave him be as he's the only one showing up the gross inadequacies of airport security.
But make sure you throw the book at the person who is repsonsible for the security policy at LGW too and all the other BAA airports. In fact make sure they are done.
There are so many loop holes in security it is a joke.
I used to drive transit vans from landside to airside at another BAA airport in the UK and their security is lamentable. Never once did they open the van to see what was in the bags and kicking about on the floor. They made me go through the metal detector but anything I didn't want them to find could have easily been left in the glove box.
Since the majority of hijacks are inside jobs it makes sense to be tightening these areas. If the reporter has achieved this then fair play to him.