Derekl:
What type of height finding system were you using?
When was it last calibrated?
What laboratory carried out the calibration, and where is the calibration certificate?
Sorry to single you out, but that's what I would say to anyone who said things like 'it was only at 1500ft'.
Reports from untrained observers like the one in the Bracknell News should be taken with a pinch of salt.
There is a retired scientist who lives near the place where I work; he apparently has a line drawn on his window; if an aircraft passes below that line, he claims it's too low and he complains. This has never been calibrated by an approved authority of course, but as he's a scientist, the local press and NIMBYs always believe him.