Thanks Al and Andrew!
After breakfast I had a look at the other 60 sec frames taken more towards twilight and noticed a flare or short trail, which I took to be a Perseid meteor (peaks Aug 12) as it in the region of the constellation Perseus.
However, after downloading the latest satellite files in Starry Night Pro Plus 6, it appears the trail belongs to a magnitude 2.83 pass of the artificial satellite Iridium 98 [S] which showed up on in the image with an EXIF time of 5:42:13am.
As one can never have too many objects in a single frame, I blended the Iridium trail into this darker frame recorded earlier, at 5:32am.
Cheers
Dennis