We think a pigeon has been nesting in the tree.
Just now Nigel climbed into that tree – high off the ground and eventually mother pigeon flew out
I was terrified that he would find the nest. I called and cajoled. Click below
Our afternoon visitors were surprised at the climbing cat
gfreedmanblog 
Thank heaven you got him down Gill x
Thank heaven he didn’t catch the pigeons ! He’s such a character
He’s a brilliant tree climber. No idea how he does it