tt is a weeping willow. It is suffering from watermark sickness. It is rust in peace.
It was planted by the previous owner to the memory of his daughter who fell into the adjoining waterway and drowned.
That's so sad!
But on the literal bright side, the recommended treatment is felling and burning of the tree. Bonfire time!
Really sad. Can you cut a little branch, grow roots, and give it the previous owner so that he can plant it again somewhere else? Keep the memorial going?
That's terrible about the daughter.
I'd be careful with cuttings. Watermark Disease
is caused by a bacterium, and you don't want to spread it
How the bacterium spreads
11. There is strong circumstantial evidence in the case of Cricket bat willow that the bacterium can be introduced to new sites on propagation material cut from diseased stools. It can remain latent in the wood for many years before the symptoms of the disease are expressed.
I presume that's why the tree doctor asked cuch to burn it