Posted: 20/08/2017 at 10:18
Is the climber spreading over the fence and into his garden? If so, and if he doesn't want this to happen he's entitled to cut off any parts of the plant which is encroaching on his space. Perhaps he sees pushing it back as less likely to offend you than cutting it.
Have a word with him ... give him permission to prune off stray branches etc with your blessing ... or make a point of trimming off the wandering tendrils yourself.
Good neighbourly relations are worth their weight in gold and it would be a shame to fall out over a rambling honeysuckle.