The robins have built their nest

 The old copper kettle is now occupied.

I thought it was empty because it is very high up.  So I took a photograph holding my camera from above and this is what I saw!

Mrs Robin got a bit of a surprise (as did I!) because I was using flash, hoping to find a nest and eggs.  I didn't realise she was there.  However, she did not fly off and I left her some meal worms as a treat.