Are these giant weeds or something else?

[BranchingOut]

Does anyone know what these are please? Growing rapidly.

[ForeverFaithless]

Looks like 'offshoots' of a tree, is there a big tree nearby with similar leaves?

[BranchingOut]

That could make sense actually as they are quite ‘woody’.

There is a large birch about 6ft away. Could it be that? We also had some problems with roots going into a drain.

[MereDintofPandiculation]

Look too tough a texture for birch, and birch doesn't usually sucker. Is there anything else close by? Are you certain of your birch id? Does look like tree suckers.

[Bluntness100]

Isn't that a form of ivy.?

[MereDintofPandiculation]

Bluntness I see where you're coming from, but no. Even the ivies with the simplest leaves show some sign of the lobing, in the veining if nothing else.

[MaybeDoctor]

They are growing vertically rather than horizontally if you see what I mean, about a metre high.

[whojamaflip]

Any plum trees nearby? Or damsons?