Over the last few weeks I have noticed that when watering, the water often pools on the surface and runs off the edge of the pot rather than penetrating deep into the pot, and wetting the entire rootball.
In light of this, today I decided it was time to perform Autumn Soji on the tree. 'Soji' is 'to clean' in Japanese. I use the term in reference to the top 2-3cm of the soil in the pot.
Before Soji: First thing we do is get out the bent nose tweezers and rake the top of the root ball outwards. That it from the centre of the pot to the rim. (I just realised i didn't capture pictures of this

Post Soji: