Hello Ken s
Sorry I'm a bit late in replying but I've only just joined this forum and found your postings - so I hope you don't mind me joining in.
I don't know Cornwall at all but Yorkshire is a great place for photos. Try Richmond and Aysgarth for the waterfalls. Try to get up onto the Yorkshire Dales for stunning landscapes and the Lake District isn't too far either so do try to get over there too.
Hope you enjoy England - 2 weeks isn't long and you'll miss oh so much. Jan and I will be going off to North Wales again this year - seen so much there - missed so much more ;-)