Hi OP! Firstly your house is totally stunning and would be something I would be interested in—I love those old terraced houses, the exterior is gorgeous. Garden would be surmountable at you still have an entertaining space outside.
Agree with others that pics make no sense and don’t do it justice. However I think it might also be worth taking it off market and doing some small work/restyling, nothing hugely expensive (in context of price) but that might make it more appealing? My first thought was that the interior doesn’t quite live up to exterior, in that I was expecting interior to be a lot more characterful and styled. It doesn’t scream entertaining potential, and a lot of the house seems underused.
Would you consider seeing an interior stylist/designer who can give you a bit of advice towards what work would make an instant impact, then have them come in again down the line to style it for photos? Big old rooms like these can be stunning but can also look a bit bare and cold if not dressed right.
Garden: I have a friend with similar garden paving, you need to get a power washer!
Sitting room: this was my first “oh”, it’s the first interior pic and it underwhelms. It doesn’t scream heart of the house, it feels a bit like a lot of small bits and pieces (like small pieces of furniture) that juts make it look a bit drab—I think it’s one of the things about how these rooms photograph? The cushions, the small bookshelf, the pictures—all detract from any sense of wow about the room. The lighting also doesn’t look great in the first photo which would be my biggest concern, although the next photo shows this is actually not true. I think if you had a different sofa, a different colour on the walls and some good styling it would look great. Also the drapes/curtains: that colour looks old? Like they could be new, but from the colour my first thought is that they’re very old. You’ve got some great modern pieces in there, but the end result doesn’t live up to.
Kitchen: this would actually be my sticking point with the house. It looks from your photo that the kitchen has no natural light? The photo is not good at all and this would probably make me not view. When I look closely at the cupboards they’re actually quite nice, but my initial reaction to the colour is that they’re really old and need to be ripped out. Having someone repaint them a more modern shaker colour, or just a paler f&b offwhjte-would make it look a whole lot better immediately. Also the freestanding unit/island is the total wrong size and looks awkward. The space also needs styling—lights do nothing for it and make it feel drab. E.g. nice big colourful pendants would change the whole feel. If you could get walls and tiles done cheap too it might help?
Dining room: this would also be a major turn off for me, it doesn’t look like a space that you could use for entertaining. It looks like you might have 2 dining rooms, in which case you should have one for family/causal and a beautiful one? Colours, drapes, pianos, furniture and pictures here all looks dated, table is total wrong size, just have a viserval reaction of “no” to that room—however it’s a stunning space and could be a real selling point?
Two of the bedrooms (red drape room, blue duvet room) look unappealing. Furniture in front of he windows kills the main selling point! Colours done properly in these rooms could make them look 100x nicer immediately, as well as a bit of styling. They both look simulate bare and cluttered, if that makes sense?
You say you have a boot room: style that nicely and sell it! I get no impression of storage in the house, even though it’s massive, and the magnolia walls give a bit of a dated country hotel vibe. I would still consider viewing, but only if the price was exceptionally good, as I would think of it as a project (interior, kitchen and garden would all be redone).
I hope that’s helpful, I think it has amazing potential but the pictures really don’t sell it. I think you could really change first impressions for a small bit of investment in a stylist.