@ weegaz, they reason for no tiles was as you say to keep it in keeping with the street, only problem is all the houses on my side of the street are tiles of one sort or another, my own being Rosemary tiles from the 1930s. The houses across the road are slate, but what that has to do with anything is beyond me. As I said the ar5ey inspector never had a clue, but the job is completed now and I'm more than happy with it.
@ kaill, yes we are multiplying in numbers, who knows maybe some day we will rule the world
@ Grizz, Google earth and go to 'Earth' view, you can then pan over the area as if you were flying overhead
@ Mark, plenty info on the internet for slating a roof, read as much as you can then go back and re-read it all again, it's not as difficult as you think. The slate you have is it Ballachulish slate or most likely one of the Easdale quarries slate from Seal Island?