Kate54 I used John Lewis around 16 years ago when I moved in this flat, post-divorce. Think I paid £200 and a very nice chap visited and spent a long time showing me swatches, taking measurements, and so on.
My main requirement was for suitable curtains as my flat is ground floor. His suggestion for the bedrooms was stiffened voile roller blinds against the window in the recess, which would enable me to see out during the day, but no one can see in; plus roman blinds outside the recess as the radiator is under the windows. This has worked very well, giving me privacy without net curtains! I would never have thought of voile roller blinds and would never contemplate net curtains.
My sitting room leads out to a small private garden via sliding patio doors which of course are quite wide. The garden is not overlooked so I have conventional curtains which are heavy and needed a wooden 'batten' I think it's called to hang them from, rather than the flimsy rail that was already there. The batten is covered in the curtain material.
All the work, making the blinds, curtains, installing, and the batten was carried out by two JL men.
The interior designer also showed me some really lovely bedroom furniture which I'm still pleased with. I moved from a large house and my flat is quite dinky so I needed some ideas.
I can't remember but I think the £200 was deducted from the final bill. I spent a lot of money overall, but well worth it, particularly the initial visit from the designer