London Aircrash - speculation?

A Boeing 777 crashed short of the runway in London's Heathrow airport in January 2008. There is speculation that Prime Minister Gordon Brown's motorcade was passing under the approach path of BA038. His security system utilised a RF transmitter to block out any cell-phone triggered devices. Apparently this system has a range of over a mile, and it caused the Boeing 777 EEC's (electronic engine controls) to sense a "over-boost" situation, thereby commanding a reduced-thrust situation for the engines, simultaneously. 


An initial report into the incident published by the UK's Air Accidents Investigation Branch (AAIB) notes:


Following an uneventful flight from Beijing, China, the aircraft was established on an ILS approach to Runway 27L at London Heathrow. Initially the approach progressed normally, with the Autopilot and Autothrottle engaged, until the aircraft was at a height of approximately 600 ft and 2 miles from touch down. The aircraft then descended rapidly and struck the ground, some 1,000 ft short of the paved runway surface, just inside the airfield boundary fence. The aircraft stopped on the very beginning of the paved surface of Runway 27L. During the short ground roll the right main landing gear separated from the wing and the left main landing gear was pushed up through the wing root. A significant amount of fuel leaked from the aircraft but there was no fire. An emergency evacuation via the slides was supervised by the cabin crew and all occupants left the aircraft, some receiving minor injuries.


Whether the speculation is true or not is a moot point. There are 2 points to consider. 


1) Initial reports from the UK Air Accidents Investigations Branch, which is investigating the crash, have confirmed that the auto-throttles did not respond as the aircraft approached landing. The auto-throttle is controlled via the aircarft's electronic systems, wireless interference is one possible explanation, according to Paul Cousins, federal president of the Australian Licensed Aircraft Engineers Association (ALAEA).  Other Avionics experts remain reserved about such claims, preferring to blame 'dirty fuel' from Beijing on both engines failing. 


Passengers are forced to shut down mobile phones and other electronic devices since they "interfere" with the planes avionics. This is enforced on the basis of over-excessive caution, in spite of the knowledge that the signals are weak enough to be harmless. Modern aircraft relies very heavily on it's avionics, radio signals and computer software, (all of which are susceptible to strong RF signals). Its wiring bundles are heavily shielded against radiation and stray currents that might affect the integrity of the system.


2) In India, like in other countries, with the heightened sense of security, the practise of using strong RF signals to create a "silence zone" around motorcades involving VVIP's are only increasing. Many of the roads are very close to landing/take-off approaches of airports, and the RF signals in motorcades fall within the range of approaching aircrafts. I am not sure if sufficient precaution is taken on the movements of such motorcades to prevent mishaps. Remember, the Mangalore crash (a Boeing 737-800 which is also "fly by wire") recently is still foxing everyone, since there was no apparent reason for the aircraft to miss the safe touch point, when the approach was said to be quite normal. Could it be that there was interference due to any passing motorcades?