Thank you kindly sir.
The irony was that previous BSOD dumps didn't, when analysed by Whocrashed, indicate any specific driver, so I hadn't got round to look at the one that happened when I was creating the evidence files. Later when I did I saw a reference to that driver. Typical!
Despite having thought that I'd checked them all, I found that driver was out of date and have now downloaded and installed the new one. Then came here to see if there had been any thoughts.
I'll see how things go now.
Once again, many thanks. You guys really are helpful stars.