Looks like you captured him just in time before he headed off. What a pretty bird. I've never heard of a Red breasted nuthatch so I've learnt something new too.
@jo13 - thanks Jo - we have white breasted and red breasted nuthatches in the US - fabulous little birds - fun to see them creeping up and down trees and on the feeders. Not terribly shy - on occasion I have had them land on me when filling the feeders.