cheers all…

Many thanks…it was VERY low…like I said I have no idea of how to judge heights, but he disappeared from view very quickly when looking out of a 3rd story window.
The low flypast was witnessed by most of Hertford it seems and still is a subject of discussion on local forums.
If it helps ID the Bronco it had the ‘dayglow’ orange markings.

Shabby

http://www.55th.org
http://www.station131.co.uk