HI thanks so much for taking the time to reply. TBH, I can’t remember what has gone on but it all looks a bit of a mess.
I know this.
I changed the registered image sizes in the functions file to try and reduce the number created and also because my themes sizes had changed. It went from 680×450, 340×225, 680×900, x340x540, 320×321, to 180×180, 720 and maybe one more?
I then regenerated thumbs.
Not sure how I add screen shots.