Hi, The first pic makes it look shrub shaped, but the second one more like a climber. Is it all one plant or one on top of another ? Wonder if it could be an old Honeysuckle ? Are you intending to keep whatever it is ? Be interesting if someone else can confirm what it is, other than wait for it to grow some more .
Unless it hides the cure to all diseases, I'm afraid it can't stay. Its stalks are like steel cables and root wherever they touch. There are a couple of trunks I've found, so possibly two plants? Very curious to know what it might be.
Jasmine for another possibility, but I'd guess honeysuckle too. I suspect it will acquire a lot more four-letter names as you dig it out though! Considering the general reluctance of honeysuckle to roll over and die, I'd suggest hitting it with a systemic weedkiller before you start on the spade work, otherwise any bits of root you miss could well come back to haunt you
I though jasmine also, especially the quick rooting and the shape of the leaf joints, plus the stems being like steel cables.
The reason I think its Honeysuckle is due to the way the leaf is discoloured, its consistant with honeysuckle blight, Jasmine usually the leaf yellows from the centre, and fungal infections usually appear in spots or blotches that turn brown. IMO.
Looks to be 2 plants. 1. Honeysuckle. 2. Appears to be Jasmimun nudiflorum....see pics below Note the green , square stems. Should have tiny yellow flowers before the leaves.