unusual behavior ?

I spotted these two on the shed roof. The female landed first and as i was trying to focus the male arrived, I just started shooting any way. I know the focus is off im just curious about the aggressive males behavior. He was really giving it socks, and chased the female across a couple of gardens.

Marvellous set of photos - blow the focus - you recorded it !

I can only offer the obvious territorial dispute, especially as she turns up with nest material. The closest I've seen is females having a set to over possession of my compost heap !

Cheers. I think you are correct on the territorial aspect. She was in gathering bits for nesting a couple of times, I guess this time he just happened to be around.
I've seen two males running and displaying a couple of weeks ago, I don't know if that was territorial or for the benefit of a female. Must keep a closer eye out.
You may set up watch on your compost heap