Thank you very much for your replies. I am in the UK. I have tried resolving one troublesome place name where clicking on the name brings up the wrong location. By adding England to the town and county I now get the correct location BUT the town now appears under England in the index as a sub heading and no longrer appears under the name of the town. That is odd because there are other towns that appear under "England" but they also appear in the index.
I guess I will just have to live with it.
Thanks for your help, much appreciated.