Are you able to identify what this is on a tree in my garden?

Question

Unsure what tree it is – has sycamore like leaves.

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Answer 1

I have not been able to find an image that matches up with the picture of your tree.
It appears fungal to me.

Here is a link with information on tree cankers.

https://www.gardeningknowhow.com/ornamental/trees/tgen/cankers-on-trees.htm