Plants like Berberis and Pyracantha have long been used as good 'deterrents', and with a properly prepped bed/border, and decent sized plants, they'll grow quite quickly. Both are regularly used as hedging, so there's no problem with keeping them at a suitable height. Various varieties of them, and we're rapidly approaching bare root season, so you'll find them on most hedging suppliers' sites at a good price. The aforementioned Rosa rugosa and Osmanthus [as long as it's the jaggy one] are also really good. The Rosa.r is very quick growing, and can certainly be kept quite neat.
Taking cuttings would be a slow process for you @cathpole06, so it's better to plant something of a reasonable size. It's infuriating when folk are thoughtless, but it's a fairly inexpensive way of solving the problem, and will hopefully save you from having to do repairs on the wall.
It's a place where beautiful isn't enough of a word....
I live in west central Scotland - not where that photo is...
Whatever you decide you'll need to get the wall repaired and you could then paint the top layer with one of those anti burglar paints that never dries but stains what/whoever touches it. Put up a wee sign to say it's there and that people who touch or sit on it risk being stained.
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
Whatever you decide you'll need to get the wall repaired and you could then paint the top layer with one of those anti burglar paints that never dries but stains what/whoever touches it. Put up a wee sign to say it's there and that people who touch or sit on it risk being stained.
Not wishing to "rain on anyone's parade," I'd be wary of using "anti climb" paint.
The problem as I see it is that the wall borders on a public footpath, correct me if I'm wrong, but we now live in a world ruled by "elf n' safety," where we are expected to take all measures to prevent the public from even "deliberately injuring themselves."
I regularly prune back the azaleas (with garden shears) in the photo I inked, when they start to overhang the footpath, (as they were starting to do there) just in case someone should pass with a child in a pushchair whose face might brush against them and cause an injury and knows "an ambulance chasing solicitor."
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The aforementioned Rosa rugosa and Osmanthus [as long as it's the jaggy one] are also really good. The Rosa.r is very quick growing, and can certainly be kept quite neat.
Taking cuttings would be a slow process for you @cathpole06, so it's better to plant something of a reasonable size. It's infuriating when folk are thoughtless, but it's a fairly inexpensive way of solving the problem, and will hopefully save you from having to do repairs on the wall.
I live in west central Scotland - not where that photo is...