I agree with @Silver surfer re the timing of taking off the sport below the graft, if that's what you intend. It's not an ideal time of year when it's growing away so well.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
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"Have nothing in your garden that you don't know to be useful, or believe to be beautiful."
I have turned/trimmed your pic .
I would wait till winter.
Then completely remove the green side branch which coming from below the graft.
I live in west central Scotland - not where that photo is...