Oirish I found your original post in this thread confusing because in your comments re several hedges you said
" - cupresso cyparis leylandii are now not allowed in certain parts/ domestic/ housing in england
- leylandii davidii? viburnum davidii is more ground cover
- escallonia: macrantahs = no;
- escallonia: apple blossom = yes
- photinia red robin = maybe; but can go very woody & grow well over 8'
- laurel; i assume prunus laurocerasus; same as above
- privot; ligustrum ovalifolium aurea [variegata] - not a chance
- grisilina litoralis - as above
- box; buxus semprevirens - too slow growing and therefore too expensive "
.....so for laurel and grisilinia you say " as above " yet for the hedges above them in your list your recommendations range from a " yes " to a " no " to a " maybe ". For escallonia ( apple blossom ) you give a " yes" and then you go on to say " no offence to any of the suggestions but - if you like cutting hedges regularly and getting a new black and decker every fathers day then thats fine - other than that -
stay well away." ( highlighted by me )

. As regards the new Black and Decker every fathers day I took that to mean that the hedges were high maintenance in relation to trimming ( ie you'd need a new shears every year ) which is not my experience with laurel or grisilinia though I have no doubt that if I didn't trim them once a year they would grow to the heights you describe.
One of your recommendations at the end of your first post is " fagus sylvatica " or beech, which, while it retains it's dried leaves for most of the winter, it is not an evergreen and is not classed as such afaik.