747s at LTN?

[Globaliser]

On Sunday afternoon I was on the canal near Leighton Buzzard when a 747 flew over heading roughly north. At a guess, this was at about 5000 feet, although I don't have much experience to judge this by.

There's always a lot of LTN traffic around this area, but I'm wondering whether the one I saw was likely to have come from there or was just a low-flying LHR departure.

[The Greaser]

Heathrow departures on Woburn departures frequently fly at lowish altitudes over this area. Probably one of those.

[ALLDAYDELI]

I saw this from Northampton area and wondered... It seemed to be in a descent manouevre, it was coming down. Chances are it ws probably the same aircraft.