Well now the IDE shows the location as co-ordinates (N & W) and timezone as Europe, London. I didn’t view location in the IDE when I was having the problem. WebCoRE was my first venture in Smartapps, so nothing previous could have messed with it.
The ‘built in Smartapp I added, after which Webcore seemed to be happy with location setup was doorknock, which does not have time or place settings.