UPDATE: AAIB investigation into BA38 B777 crash at LHR
Smilin Ed said:
"There has been much discussion as to whether faulty software or Electromagnetic Interference (EMI) played a part in this accident."
EMI, like "pilot error" is something which leaves little or no evidence behind, and so is a convenient explanation for otherwise inexplicable events.
Modern airliners emit a lot of radio frequency radiation for many purposes, and their instruments and controls are made to tolerate quite high levels of EMI.