I can't give you a name for the fungus but it's a sign that all is not well with the tree.
These fungi live on dead and dying wood. Therte's nothing you can do, the problem is inside the tree. Enjoy it while it's there
I doubt if there would be problems unless it's up against the tree
I know this as Mina lobata but I think it's had a name change. Google will give you the modern name
Can you get a close photo so we can see the shape of the flowers and leaves. This one enlarges to a blur
Can we have a good clear photo of some healthy leaves
A definite ID would help show the way forward.
Got it Jo
I hink you're right with Inula, Fritillary
I just wandered out to look at my I. helenium and the buds are not dark like that but very much the same style. It's also about 8ft tall.
I don't get many yarrow flowers, it seems to grow best where it gets mowed.
I was going to PM you jo but couldn't. PM me your address if you want some yellow rattle seeds
I wouldn't have pulled that up
Yarrow makes a good green cover jo
You might need some yellow rattle to make the grass a bit less grassy