Hi Fifi, forgetting this particular accident for a second, I dont think any self repecting terrorist these days would be using passports of different nationalities, especially if they were stolen a year ago. They are far more sophisticated than that. Someone knowing he can sell it on to someone who has to, or needs to leave the country in a hurry maybe, but not terrorists.
I still find Heathrow most unsecure when it comes to checks. Every time I land at Sydney everyone's passport is checked. The number of times at Heathrow i with many others have been waved through is ridiculous. I even complained once. No wonder the UK has an illegal immigrant problem lol.