Jimmy, go with beech. Three rows wide, a good solid hedge. Provides great shelter and habitat when up. Did quite a lot of hedge planting years ago. Beech is easy to plant. If you want security, thorn. But it’s a pain to plant
If ur planning to lay it in future i wouldnae plant 3 rows thick.
I imagine it might be a nightmare to lay.
But it may depend on the style, id imagine any styles with stakes would be a pain
Like i said id speak to a local hedgelayer.
Ask species that grow well locally to u and spacings, wether he prefers double fenced with rabbit net ( if so how wide? Wide enough he can lay behind fence with oit taking them down or tight to hedge?)
Or wot tubes/spirals he prefers
He might also tell u not to cut it at all as he will want it 8-12ft high for laying.
While beech is a very goid hedging plant.
It mibbee would be a touch boring for 100% of hedge. A few species that flower and/or provide a mix feed for birds and insects etc
Ur thorns can be good but obviously jaggy. Blackthorn can be nice for early flowers and sloes, but the thorns can carry a bacteria that carries sepsis.
Thats why if u get a blackthorn skelf it often becomes poisoned and bloody sore, that u dont often get with other thorns/skelfs.
Just sonething to be aware off