There's a man waving not drowning

I was out doing a take on this morning and popped out in the garden to take some photos when I heard a shout from high up. Actually it was more of an "Oi, oi!" which made me think I might see someone mooning on a roof.

Thank goodness it was just this guy waving at me to take a picture of him and make him famous. I didn't catch his name......