A plain wall with an opening at about 5-6 ft or just make it to this height, our neighbour has this it looks fantastic, simple, gives privacy and lets light into both spaces. I'am guessing that you will be using the RH door for entry. good luck

Congrats on choosing blocks for your garden bed. If you're looking for trees, I suggest considering a maple tree. They grow nicely over time, providing shade and privacy. I recently moved to a new house myself, and I'm also exploring plant options. Back in my hometown, we had a reliable tree service that helped us with planting and maintenance. Maybe you can find something similar in your area. I came across this website, https://www.deepdale-trees.co.uk , which might be helpful for you. They offer a variety of trees and services.

We installed an old school keyless entry lock (Lockwood) a few years ago. Best thing we ever did. Ours is the old fashioned push button one as I didn’t want to be caught out by dead batteries or other tech hacks that could occur.

The pivot doors that Julie has posted are out of character , and like most posts so far , I like the existing door . However , being weird , I'd leave the flyscreen , and the frosting -- I think it all suits . Maybe needs a coat of paint -- imagine the 2 lower exterior infill panels on the door in a bright red or orange to lift the look , tie in with the brick , add some colour ? Or do the whole door and the wrought iron scrolls of the screen in 1950's pastel mint green or apricot -- the reverse of modernising ! Also unlike most , I don't particularly like the wooden panels above the door and the bay window -- I know some will scorn , but I'd either plaster smooth , or maybe go with glass ( yes , frosted ) with little net curtains -- I suspect the outside view of this isn't really visible ( under a veranda I gather ? ) but to me , it would tidy the inside look , look period , and tie it all in . Then , add a red leather lounge suite or chairs ( depending on that rooms use ) and at least 1 big colourful abstract painting -- that is the way to add class and colour and some modern looks IMO , not by adding an ultramodern door to what is essentially a 40 year old house . Just my thoughts .