I contacted the Yahoo group Deepskyhunters. It turns out it is a known PN.
It was a worthwhile exercise as I now know more about checking data bases.
Here is an animated gif with an image from SuperCOSMOS H-alpha Survey and my image. 5MB
http://d1355990.i49.quadrahosting.co...3_04/NPN_2.gif
SuperCOSMOS H-alpha Survey here
http://www-wfau.roe.ac.uk/sss/halpha/hapixel.html
The MASH catalogue of Planetary Nebula here
http://vizier.u-strasbg.fr/vizier/MASH/
Bert