On 27/05/2021 11:31, George Miles wrote:
Advice please on possibly cutting a trench through up to a fifth of this tree's roots please...

Is there a way to do this without seriously injuring this wonderful tree?

Damage is damage. Minimise it by putting the run further from the tree,
maybe the other side of the wall, from where your wheelbrrow is.

Roots are invasive re your pipework...