Fast growing, unknown plant

Can anyone tell me what this plant is please? I have mixed feelings about it. It's a bit ugly and potentially prone to disease as leaves often brown, but it grows quickly and provides decent height. It's quite a dominant plant and I think its root system has maybe stopped other nearby plants from growing e.g., some nepeta/catmint.

 

Which plant are you referring to, one is a coryline, don't have a clue about the leafy one on the left.

 

It’s quite hard to see the front plant because of the way the light is falling. Would it be possible to take another photo with a clearer image of the leaves and stems?

 

Could we also see the base of the plant please … where it’s coming out of the ground.

Alsi, how long has it been growing there? Does it flower? What happens to it in the winter? Do you cut it back at all, if so when?

 

I was referring to the leafy one in the foreground. I planted the cordyline myself, it has grown huge, it's about 6 feet, 5 inches now.

 

Hi @Butterfly6 and @Dovefromabove here are some additional images. I do not believe it flowers, if so it's nothing spectacular. In the winter it doesn't die back, but it does start to look a bit scraggly so I generally cut it back. Quite hard showing a clear picture of the stem/base but I've tried moving some lavender and grasses out the way to get a clearer shot.

 

If you are cutting it back its probably why it grows away so fast, also could be the reason why it doesn't flower.

 

Looks very much like a Hazel to me

 

I was thinking beech or hornbeam but maybe the leaf veins aren't quite prominent enough. Hazel is a good shout. Certainly some sort of tree, possibly grown from a seed rather than deliberately planted.

 

I was wondering about Philadelphus which flowers on second year wood, but I can’t see from the pictures whether the leaves are opposite or alternate.

 

Thanks all. Based on what has been suggested, I believe the closest resemblance is philadelphus - it could well be that.

 

Another possibility is goat willow

 

If it is a philadelphus don’t cut it back .. hopefully you’ll get beautiful strongly scented blooms in the early summer