You'd be surprised at how many times the aircraft type on the flight plan is incorrect!
And what is done about it? If it is incorrect then desn't that mean it was incorrect when the aircraft departed, doesn't it mean that there might have been a BOS involving the aircraft before it got to Heathrow Director frequency, doesn't it mean that incorrect charges may be levied. A local workaround when there is perhaps a systemic problem.
What reporting occurs? I guess nothing, world's best practice, don't think so.