MayBee70
There’s 73 miles of Hadrians Wall. Are you thinking the sycamore might have caused some kind of domino effect?
It was very close to the Wall itself.. The roots of a tree that large extend a long distance and could well have been affecting the Wall. However, no-one has expressed any concern about that so I assume that the National Trust must have thought it OK.
I'm surprised that there aren't any of its offspring in the vicinity. I pull up or mow down thousands of sycamore seedlings every spring.
The stump will regrow a thicket of shoots, that's what sycamores do. It would be most unattractive and unphotogenic. It will never be a single stemmed tree again. I'd have it dug out completely and replaced. But it's not my garden ..
The tree could easily be replaced with a well grown specimen, though I don't know how good the growing conditions are in that particular exposed spot. It might take a very long time to achieve the old tree's dimensions.
But replacing it could well affect the Wall, which must surely have all sorts of protections on it as an ancient monument. It could be a dilemma.
The National Trust could make a mint selling artefacts made from its wood to tourists.... There would probably be enough to make a commemorative bench, or similar, to put by the Gap...