Derrr.....

Attempt 1:  Climb the tree (Hmm haven't done this for a while, get the knees in gear)  Attach the cleverly (!) sourced belt to the camera and the tree trunk.    The belt is too long and won't tighten.

Attempt 2:  Climb the tree (those knees and the upper body really need some work) attach the camera to the washing line.  Nope the washing line is too tight.

Attempt 3:  Climb the tree (where are those creaking noises coming from?) oh blast where did the camera go?  Walk around to neighbours to ask permission to climb up on their garden.  Thank you David!

Attempt 4:  Lightbulb moment - wasn't there a bungee in the desk drawer?  Well, where else?  Success!

Success?!  Okay so there seems to be a slight problem with the angle.....