Right, I've done some googling. From memory it looked very much like a Agusta 109 - certainly the shape and u/c config looks the same.
Anyway, just to clarify my intentions. As a fellow pilot I'm not interested in "reporting" anyone (even IF any regs had been broken). I'm just curious as to how low flying
private aircraft can operate in the Heathrow zone on a regular basis (assuming it was private of course).
I assume it would have to be a twin to get special VFR in the zone for a start?
So, this is where my curiosity is leading me....if I were to purchase a twin engined aircraft could I then operate it from a field next to my house (well inside the zone) by simply requesting special VFR prior to departure everytime I wanted to fly to Chelski to see the Saturday match?! (which is what this helicopter might well be doing?). Surely not?
By the way, this is completely hypothetical. I don't own a large field, nor have the funds to purchase a flying machine! (Nor would I choose to attend Chelski games).