A brief "google" search suggests not.. in fact this is quite interesting:-
Helicopter Noise - a Freedom of Information request to Metropolitan Police Service (MPS) - WhatDoTheyKnow
The FOI request is of course OTT but in the response there is comment that the ASU has kept their own records of complaint since 2011.
Last edited by Pittsextra; 22nd Nov 2012 at 11:36.