On 15/04/2019 16:07, DerbyBorn wrote:
Should I really go for it and cut it down and let it regrow, resolving not
to let it get as bad? Or should I thin it right back to the wall and thin
out some of the tangle of branches?

Nuke it.

Cut it off at the roots, and paint the end of the stumps with
glyphosate. And again every time it regrows.

Put something less aggressive up your wall. You'll never get the ivy
marks off.

Andy