Hi Gary and Doug,
Thanks for the comments
According to the EXIF data the exposure was 4 seconds at f5.6 with ISO 800, and I had my 100-400 zoom lens set at 260mm. However, I had set the ISO at "H", which I believe to be 3200, as I have downloaded the Russian mod to my 300D, so I really can't say what it is exactly. I cropped the shot, and modified the levels slightly in PhotoShop, but to no great extent.
I recall sometime in the late 80's walking at night on the beach just north of Noosa, and seeing some luminescence in our footprints, but it wasn't as bright as this by any means.
What really interests me is that this morning, I went to photograph the fungi in daylight, but even though I had left a marker at the point where I saw them, there was absolutely no evidence at all of any fungi. I shall have another look tonight.
Hmmmmmm, maybe it was an alien, and aliens look like fungi, whereas all the time we have been thinking they have antennae, big eyes and the rest.........