This looks sooooo good, well done! Very satisfying thread to follow aha! Was putting the barn door difficult? I plan on doing it but I have limited DIY knowledge!

I'd double-down , and replace the ( admittedly fairly tacky ) decorative glass with a genuine leadlight -- theres all sorts you can get , some that are more modern in design , some traditional . I wouldn't go abstract , but judging by the pictures of the room , I think that chosen well , it would add interest and class and a bespoke addition .

Why can't you just position the rod centrally over the window with a 15cm extra rod from window frame on either side for curtains to collect. With a central opening. dont worry about the off centre. And from your photos I would measure the wall from window to end of wall on each side. It is a minimal difference. Looks more like an optical illusion because wall where the person is sitting is angled. If there is a big space there, stick a nice tall plant there to even if up.

oklouise: I appreciate your idea. Sounds good. This is the access which is on the northern side of our lot. Access to the back of the property. The lot is E-W rectangular plot. The access upto the gate would be frequented by meter readers from the front of the property. The gate comes as shown after the down pipe with the hinge on the pole affixed to my wall while the other pole goes butting with the retain wall and as the fencing guy has told me he will put in non expandable grout to hold the pole in place and there would be a bare 5-10mm gap between the neighbour's wall and the pole. The gate would open inwards into our property so as u look into the photo the gate open inwards right. Also I could not gather the concrete bit maybe concrete language is hard for me to understand. i will ask my landscaper but if youcan shed some more detail for the approach that would be very much appeciated kindly. We are not planning to concrete but if that is a way then we can think. We are actually planning to put in thick liimestone steppers and decorative stones. Any other fair ways/ideas for landscaping on this stretch is welcome