Mark Allread wrote:

How can a window overhang the boundary unless you have also gone into his
loft space?

That certainly hasn't happened. But his contention is that it's the outer
surface of the timber construction (Marley Cedral cladding) which is over
the border.

https://www.marleyeternit.co.uk/Faca...therboard.aspx

As I said, if the overlap *is* there it's pretty minimal. His argument
seems to be that an inch (or even a fraction of an inch) is as good - or
rather as bad - as a mile.