Thanks, guys. I knew I was facing the sunlight, but I didn't really see the rays until I uploaded it to the laptop. I darkened them in Levels, just a wee bit, and ditto contrast, then put a frame on via Nik colour. Used the Velvia setting in the X100.
The whole area is great for photography, and only ten minutes walk from my house. Yes, Steve, it's in Edinburgh, just ten minutes again from Princess Street. Next time you are here, drop me a line, and I'll take you to it if you have the time.