Q.I Had Planned To Have 3.5m Cut Off My Approx 8m Cherry Tree.I Have Now Noticed There’s A Hole In The Bottom Of The Trunk Where I
can put my whole hand in.Can you advise me if this is safe to go ahead and just trim or should I completely remove as it’s near my property? Is it the right time of year to get a cherry tree trimmed? Thank you I have attached 2 photos but I can’t see them. Please let me know if you received them

Certified GKH Gardening Expert
As long as the tree looks healthy (and yours does), the hole should not affect it.
If yours is a sweet cherry tree, you can prune in summer. Otherwise, it's best to trim when the tree is dormant. Here is more:
https://www.gardeningknowhow.com/edible/fruits/cherry/cherry-tree-pruning.htm
https://www.gardeningknowhow.com/edible/fruits/cherry/cherry-tree-diseases.htm
https://www.gardeningknowhow.com/ornamental/trees/tgen/patching-tree-hole.htm