Hey All,
Just thought I'd round off this thread with a pic.
In the end I cleaned up all the low level tiles (awning, windows sills, etc.) and turned the gutters around as suggested. The downpipes I restored with some t-cut and a coat of yacht varnish. The flaky / moved tiles just need addressing now, but I clean stuff, I don't repair stuff
Thanks for the hints and tips.
Kewin.